US Size 10.50

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4710 Products Found
Center Stone Size 1.00 3.00 Carat (most popular)
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Cubic Zirconia Engagement Ring- The Evie (Customizable Radiant Cut Solitaire with Grooved Band)
0.75 Carat1.00 Carat1.50 Carat2.50 Carat3.00 Carat4.00 Carat5.00 Carat

Cubic Zirconia Engagement Ring- The Evie (Customizable Radiant Cut Solitaire with Grooved Band)

From $260.35 USD
Sometimes secretaries seduce their bosses. Assistants, too. And yes, vice versa. The truth is, it's been a reality of life for as long as we put on dress clothes and...
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Cubic Zirconia Engagement Ring- The Evie (Customizable Round Cut Solitaire with Grooved Band)
0.75 Carat1.00 Carat1.25 Carat1.50 Carat2.00 Carat3.00 Carat3.50 Carat2.50 Carat

Cubic Zirconia Engagement Ring- The Evie (Customizable Round Cut Solitaire with Grooved Band)

From $281.61 USD
Sometimes secretaries seduce their bosses. Assistants, too. And yes, vice versa. The truth is, it's been a reality of life for as long as we put on dress clothes and...
Quick view
Cubic Zirconia Engagement Ring- The Fabiola (Customizable Cathedral-raised Asscher Cut Design featuring Rope-Braided Half-Pavé Band)
0.65 Carat1.00 Carat1.50 Carat2.50 Carat

Cubic Zirconia Engagement Ring- The Fabiola (Customizable Cathedral-raised Asscher Cut Design featuring Rope-Braided Half-Pavé Band)

From $305.19 USD
The Fabiola will twist around your beloved's finger, intertwining in its braided-rope style band design a lasting reminder of your love and devotion. Love knots were the inspiration for this...
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Cubic Zirconia Engagement Ring- The Fabiola (Customizable Cathedral-raised Cushion Cut Design featuring Rope-Braided Half-Pavé Band)
0.65 Carat1.00 Carat1.50 Carat2.50 Carat3.50 Carat5.00 Carat9.50 Carat

Cubic Zirconia Engagement Ring- The Fabiola (Customizable Cathedral-raised Cushion Cut Design featuring Rope-Braided Half-Pavé Band)

From $301.27 USD
The Fabiola will twist around your beloved's finger, intertwining in its braided-rope style band design a lasting reminder of your love and devotion. Love knots were the inspiration for this...
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Cubic Zirconia Engagement Ring- The Fabiola (Customizable Cathedral-raised Emerald Cut Design featuring Rope-Braided Half-Pavé Band)
0.75 Carat1.00 Carat1.50 Carat2.50 Carat3.00 Carat4.00 Carat5.00 Carat8.50 Carat

Cubic Zirconia Engagement Ring- The Fabiola (Customizable Cathedral-raised Emerald Cut Design featuring Rope-Braided Half-Pavé Band)

From $319.31 USD
The Fabiola will twist around your beloved's finger, intertwining in its braided-rope style band design a lasting reminder of your love and devotion. Love knots were the inspiration for this...
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Cubic Zirconia Engagement Ring- The Fabiola (Customizable Cathedral-raised Oval Cut Design featuring Rope-Braided Half-Pavé Band)
0.50 Carat1.00 Carat1.50 Carat2.50 Carat3.00 Carat4.00 Carat5.00 Carat5.50 Carat

Cubic Zirconia Engagement Ring- The Fabiola (Customizable Cathedral-raised Oval Cut Design featuring Rope-Braided Half-Pavé Band)

From $320.59 USD
The Fabiola will twist around your beloved's finger, intertwining in its braided-rope style band design a lasting reminder of your love and devotion. Love knots were the inspiration for this...
Quick view
Cubic Zirconia Engagement Ring- The Fabiola (Customizable Cathedral-raised Princess/Square Cut Design featuring Rope-Braided Half-Pavé Band)
0.75 Carat1.00 Carat1.25 Carat1.50 Carat2.00 Carat2.50 Carat3.50 Carat5.00 Carat

Cubic Zirconia Engagement Ring- The Fabiola (Customizable Cathedral-raised Princess/Square Cut Design featuring Rope-Braided Half-Pavé Band)

From $320.09 USD
The Fabiola will twist around your beloved's finger, intertwining in its braided-rope style band design a lasting reminder of your love and devotion. Love knots were the inspiration for this...
Quick view
Cubic Zirconia Engagement Ring- The Fabiola (Customizable Cathedral-raised Radiant Cut Design featuring Rope-Braided Half-Pavé Band)
0.75 Carat1.00 Carat1.50 Carat2.50 Carat3.00 Carat4.00 Carat5.00 Carat8.50 Carat

Cubic Zirconia Engagement Ring- The Fabiola (Customizable Cathedral-raised Radiant Cut Design featuring Rope-Braided Half-Pavé Band)

From $319.31 USD
The Fabiola will twist around your beloved's finger, intertwining in its braided-rope style band design a lasting reminder of your love and devotion. Love knots were the inspiration for this...
Quick view
Cubic Zirconia Engagement Ring- The Fabiola (Customizable Cathedral-raised Round Cut Design featuring Rope-Braided Half-Pavé Band)
0.75 Carat1.00 Carat1.25 Carat1.50 Carat2.00 Carat3.00 Carat3.50 Carat2.50 Carat

Cubic Zirconia Engagement Ring- The Fabiola (Customizable Cathedral-raised Round Cut Design featuring Rope-Braided Half-Pavé Band)

From $340.04 USD
The Fabiola will twist around your beloved's finger, intertwining in its braided-rope style band design a lasting reminder of your love and devotion. Love knots were the inspiration for this...
Quick view
Cubic Zirconia Engagement Ring- The Faida (Customizable Cathedral-set Emerald Cut Design with Halo and Milgrained Pavé Band)
0.75 Carat1.00 Carat1.50 Carat2.50 Carat3.00 Carat4.00 Carat5.00 Carat

Cubic Zirconia Engagement Ring- The Faida (Customizable Cathedral-set Emerald Cut Design with Halo and Milgrained Pavé Band)

From $490.07 USD
Hair down; almost naked; armor stripped away; a moment to yourself in front of the mirror after waking. A smile, remembering his strong arms around you. A second smile, anticipating...
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Cubic Zirconia Engagement Ring- The Faida (Customizable Cathedral-set Oval Cut Design with Halo and Milgrained Pavé Band)
0.50 Carat1.00 Carat1.50 Carat2.50 Carat3.00 Carat4.00 Carat5.00 Carat

Cubic Zirconia Engagement Ring- The Faida (Customizable Cathedral-set Oval Cut Design with Halo and Milgrained Pavé Band)

From $488.67 USD
Hair down; almost naked; armor stripped away; a moment to yourself in front of the mirror after waking. A smile, remembering his strong arms around you. A second smile, anticipating...
Quick view
Cubic Zirconia Engagement Ring- The Faida (Customizable Cathedral-set Radiant Cut Design with Halo and Milgrained Pavé Band)
0.75 Carat1.00 Carat1.50 Carat2.50 Carat3.00 Carat4.00 Carat5.00 Carat

Cubic Zirconia Engagement Ring- The Faida (Customizable Cathedral-set Radiant Cut Design with Halo and Milgrained Pavé Band)

From $490.07 USD
Hair down; almost naked; armor stripped away; a moment to yourself in front of the mirror after waking. A smile, remembering his strong arms around you. A second smile, anticipating...
Quick view
Cubic Zirconia Engagement Ring- The Faida (Customizable Cathedral-set Round Cut Design with Halo and Milgrained Pavé Band)
0.25 Carat0.33 Carat0.40 Carat0.50 Carat0.75 Carat0.80 Carat1.00 Carat1.25 Carat1.50 Carat1.90 Carat2.00 Carat2.50 Carat3.00 Carat3.50 Carat4.75 Carat

Cubic Zirconia Engagement Ring- The Faida (Customizable Cathedral-set Round Cut Design with Halo and Milgrained Pavé Band)

From $468.04 USD
Hair down; almost naked; armor stripped away; a moment to yourself in front of the mirror after waking. A smile, remembering his strong arms around you. A second smile, anticipating...
Quick view
Cubic Zirconia Engagement Ring- The Fallon (Customizable Enhanced 3-stone Style with Asscher Cut Center, Emerald Cut Accents, Double Halo and Thin Shared Prong Band)
0.65 Carat1.00 Carat1.50 Carat2.50 Carat

Cubic Zirconia Engagement Ring- The Fallon (Customizable Enhanced 3-stone Style with Asscher Cut Center, Emerald Cut Accents, Double Halo and Thin Shared Prong Band)

From $935.64 USD
Featuring a stunning, thin-banded ring shank inlaid with small, brilliant, round-cut,  shared-prong style CZ stones cascading down to a Euro shank bottom from a raised center stone setting, this customizable...
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Cubic Zirconia Engagement Ring- The Fallon (Customizable Enhanced 3-stone Style with Cushion Cut Center, Emerald Cut Accents, Double Halo and Thin Shared Prong Band)
0.65 Carat1.00 Carat1.50 Carat2.50 Carat3.50 Carat5.00 Carat9.50 Carat

Cubic Zirconia Engagement Ring- The Fallon (Customizable Enhanced 3-stone Style with Cushion Cut Center, Emerald Cut Accents, Double Halo and Thin Shared Prong Band)

From $918.46 USD
Featuring a stunning, thin-banded ring shank inlaid with small, brilliant, round-cut,  shared-prong style CZ stones cascading down to a Euro shank bottom from a raised center stone setting, this customizable...
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Cubic Zirconia Engagement Ring- The Fallon (Customizable Enhanced 3-stone Style with Emerald Cut Center, Emerald Cut Accents, Double Halo and Thin Shared Prong Band)
0.75 Carat1.00 Carat1.50 Carat2.50 Carat3.00 Carat4.00 Carat5.00 Carat

Cubic Zirconia Engagement Ring- The Fallon (Customizable Enhanced 3-stone Style with Emerald Cut Center, Emerald Cut Accents, Double Halo and Thin Shared Prong Band)

From $949.18 USD
Featuring a stunning, thin-banded ring shank inlaid with small, brilliant, round-cut,  shared-prong style CZ stones cascading down to a Euro shank bottom from a raised center stone setting, this customizable...
Quick view
Cubic Zirconia Engagement Ring- The Fallon (Customizable Enhanced 3-stone Style with Oval Cut Center, Emerald Cut Accents, Double Halo and Thin Shared Prong Band)
0.25 Carat0.50 Carat1.00 Carat1.50 Carat2.50 Carat3.00 Carat4.00 Carat5.00 Carat

Cubic Zirconia Engagement Ring- The Fallon (Customizable Enhanced 3-stone Style with Oval Cut Center, Emerald Cut Accents, Double Halo and Thin Shared Prong Band)

From $889.71 USD
Featuring a stunning, thin-banded ring shank inlaid with small, brilliant, round-cut,  shared-prong style CZ stones cascading down to a Euro shank bottom from a raised center stone setting, this customizable...
Quick view
Cubic Zirconia Engagement Ring- The Fallon (Customizable Enhanced 3-stone Style with Princess/Square Cut Center, Emerald Cut Accents, Double Halo and Thin Shared Prong Band)
0.75 Carat1.00 Carat1.25 Carat1.50 Carat2.00 Carat2.50 Carat3.50 Carat5.00 Carat

Cubic Zirconia Engagement Ring- The Fallon (Customizable Enhanced 3-stone Style with Princess/Square Cut Center, Emerald Cut Accents, Double Halo and Thin Shared Prong Band)

From $990.95 USD
Featuring a stunning, thin-banded ring shank inlaid with small, brilliant, round-cut,  shared-prong style CZ stones cascading down to a Euro shank bottom from a raised center stone setting, this customizable...
Quick view
Cubic Zirconia Engagement Ring- The Fallon (Customizable Enhanced 3-stone Style with Radiant Cut Center, Radiant Cut Accents, Double Halo and Thin Shared Prong Band)
0.75 Carat1.00 Carat1.50 Carat2.50 Carat3.00 Carat4.00 Carat5.00 Carat

Cubic Zirconia Engagement Ring- The Fallon (Customizable Enhanced 3-stone Style with Radiant Cut Center, Radiant Cut Accents, Double Halo and Thin Shared Prong Band)

From $949.18 USD
Featuring a stunning, thin-banded ring shank inlaid with small, brilliant, round-cut,  shared-prong style CZ stones cascading down to a Euro shank bottom from a raised center stone setting, this customizable...
Quick view
Cubic Zirconia Engagement Ring- The Fallon (Customizable Enhanced 3-stone Style with Round Cut Center, Emerald Cut Accents, Double Halo and Thin Shared Prong Band)
0.75 Carat1.00 Carat1.25 Carat1.50 Carat2.00 Carat2.50 Carat3.00 Carat3.50 Carat

Cubic Zirconia Engagement Ring- The Fallon (Customizable Enhanced 3-stone Style with Round Cut Center, Emerald Cut Accents, Double Halo and Thin Shared Prong Band)

From $986.32 USD
Featuring a stunning, thin-banded ring shank inlaid with small, brilliant, round-cut,  shared-prong style CZ stones cascading down to a Euro shank bottom from a raised center stone setting, this customizable...
Quick view
Cubic Zirconia Engagement Ring- The Faride (Customizable Heavy Prong-Set Asscher Cut Style with Round Cut Band Accents)
0.65 Carat1.00 Carat1.50 Carat2.50 Carat

Cubic Zirconia Engagement Ring- The Faride (Customizable Heavy Prong-Set Asscher Cut Style with Round Cut Band Accents)

From $364.98 USD
The most appreciated gifts are such as this ring, which doesn't shout how great it is... it whispers how great you think SHE is. Daily. Exotic and elegant: does that...
Quick view
Cubic Zirconia Engagement Ring- The Faride (Customizable Heavy Prong-Set Cushion Cut Style with Round Cut Band Accents)
0.65 Carat1.00 Carat1.50 Carat2.50 Carat3.50 Carat5.00 Carat9.50 Carat

Cubic Zirconia Engagement Ring- The Faride (Customizable Heavy Prong-Set Cushion Cut Style with Round Cut Band Accents)

From $360.97 USD
The most appreciated gifts are such as this ring, which doesn't shout how great it is... it whispers how great you think SHE is. Daily. Exotic and elegant: does that...
Quick view
Cubic Zirconia Engagement Ring- The Faride (Customizable Heavy Prong-Set Emerald Cut Style with Round Cut Band Accents)
0.33 Carat0.75 Carat1.00 Carat1.50 Carat2.50 Carat3.00 Carat4.00 Carat5.00 Carat

Cubic Zirconia Engagement Ring- The Faride (Customizable Heavy Prong-Set Emerald Cut Style with Round Cut Band Accents)

From $355.35 USD
The most appreciated gifts are such as this ring, which doesn't shout how great it is... it whispers how great you think SHE is. Daily. Exotic and elegant: does that...
Quick view
Cubic Zirconia Engagement Ring- The Faride (Customizable Heavy Prong-Set Oval Cut Style with Round Cut Band Accents)
0.50 Carat1.00 Carat1.50 Carat2.50 Carat3.00 Carat4.00 Carat5.00 Carat5.50 Carat

Cubic Zirconia Engagement Ring- The Faride (Customizable Heavy Prong-Set Oval Cut Style with Round Cut Band Accents)

From $380.44 USD
The most appreciated gifts are such as this ring, which doesn't shout how great it is... it whispers how great you think SHE is. Daily. Exotic and elegant: does that...
Quick view
Cubic Zirconia Engagement Ring- The Faride (Customizable Heavy Prong-Set Princess/Square Cut Style with Round Cut Band Accents)
0.75 Carat1.00 Carat1.25 Carat1.50 Carat2.00 Carat2.50 Carat3.50 Carat5.00 Carat

Cubic Zirconia Engagement Ring- The Faride (Customizable Heavy Prong-Set Princess/Square Cut Style with Round Cut Band Accents)

From $380.57 USD
The most appreciated gifts are such as this ring, which doesn't shout how great it is... it whispers how great you think SHE is. Daily. Exotic and elegant: does that...
Quick view
Cubic Zirconia Engagement Ring- The Faride (Customizable Heavy Prong-Set Radiant Cut Style with Round Cut Band Accents)
0.33 Carat0.75 Carat1.00 Carat1.50 Carat2.50 Carat3.00 Carat4.00 Carat5.00 Carat

Cubic Zirconia Engagement Ring- The Faride (Customizable Heavy Prong-Set Radiant Cut Style with Round Cut Band Accents)

From $355.22 USD
The most appreciated gifts are such as this ring, which doesn't shout how great it is... it whispers how great you think SHE is. Daily. Exotic and elegant: does that...
Quick view
Cubic Zirconia Engagement Ring- The Faride (Customizable Heavy Prong-Set Round Cut Style with Round Cut Band Accents)
0.75 Carat1.00 Carat1.25 Carat1.50 Carat2.50 Carat3.00 Carat3.50 Carat2.00 Carat

Cubic Zirconia Engagement Ring- The Faride (Customizable Heavy Prong-Set Round Cut Style with Round Cut Band Accents)

From $390.46 USD
The most appreciated gifts are such as this ring, which doesn't shout how great it is... it whispers how great you think SHE is. Daily. Exotic and elegant: does that...
Quick view
Cubic Zirconia Engagement Ring- The Farrah Michelle (Customizable Asscher Cut Style with Halo and Sculptural Trellis)
0.65 Carat1.00 Carat1.50 Carat2.50 Carat

Cubic Zirconia Engagement Ring- The Farrah Michelle (Customizable Asscher Cut Style with Halo and Sculptural Trellis)

From $521.86 USD
There will always be opportunities that come your way that you know are wrong for you and, while it can be difficult, you can learn to turn these opportunities away....
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Cubic Zirconia Engagement Ring- The Farrah Michelle (Customizable Emerald Cut Style with Halo and Sculptural Trellis)
0.33 Carat0.75 Carat1.00 Carat1.50 Carat2.50 Carat3.00 Carat4.00 Carat5.00 Carat

Cubic Zirconia Engagement Ring- The Farrah Michelle (Customizable Emerald Cut Style with Halo and Sculptural Trellis)

From $495.32 USD
There will always be opportunities that come your way that you know are wrong for you and, while it can be difficult, you can learn to turn these opportunities away....
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Cubic Zirconia Engagement Ring- The Farrah Michelle (Customizable Oval Cut Style with Halo and Sculptural Trellis)
0.25 Carat0.50 Carat1.00 Carat1.50 Carat2.50 Carat3.00 Carat4.00 Carat5.00 Carat

Cubic Zirconia Engagement Ring- The Farrah Michelle (Customizable Oval Cut Style with Halo and Sculptural Trellis)

From $495.55 USD
There will always be opportunities that come your way that you know are wrong for you and, while it can be difficult, you can learn to turn these opportunities away....
Quick view
Cubic Zirconia Engagement Ring- The Farrah Michelle (Customizable Princess/Square Cut Style with Halo and Sculptural Trellis)
0.75 Carat1.00 Carat1.25 Carat1.50 Carat2.00 Carat2.50 Carat3.50 Carat5.00 Carat

Cubic Zirconia Engagement Ring- The Farrah Michelle (Customizable Princess/Square Cut Style with Halo and Sculptural Trellis)

From $570.13 USD
There will always be opportunities that come your way that you know are wrong for you and, while it can be difficult, you can learn to turn these opportunities away....
Quick view
Cubic Zirconia Engagement Ring- The Farrah Michelle (Customizable Radiant Cut Style with Halo and Sculptural Trellis)
0.33 Carat0.75 Carat1.00 Carat1.50 Carat2.50 Carat3.00 Carat4.00 Carat5.00 Carat

Cubic Zirconia Engagement Ring- The Farrah Michelle (Customizable Radiant Cut Style with Halo and Sculptural Trellis)

From $495.32 USD
There will always be opportunities that come your way that you know are wrong for you and, while it can be difficult, you can learn to turn these opportunities away....
Quick view
Cubic Zirconia Engagement Ring- The Farrah Michelle (Customizable Round Cut Style with Halo and Sculptural Trellis)
0.75 Carat1.00 Carat1.25 Carat1.50 Carat2.50 Carat3.00 Carat3.50 Carat2.00 Carat

Cubic Zirconia Engagement Ring- The Farrah Michelle (Customizable Round Cut Style with Halo and Sculptural Trellis)

From $535.92 USD
There will always be opportunities that come your way that you know are wrong for you and, while it can be difficult, you can learn to turn these opportunities away....
Quick view
Cubic Zirconia Engagement Ring- The Fatima (Customizable Asscher Cut Center with Triple Pavé Band)
0.65 Carat1.00 Carat1.50 Carat

Cubic Zirconia Engagement Ring- The Fatima (Customizable Asscher Cut Center with Triple Pavé Band)

From $1,047.15 USD
There isn't much to say about this engagement ring that isn't encapsulated in one word: "magnificent". It looks magnificent. And she'll feel magnificent when you slip The Fatima on her...
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Cubic Zirconia Engagement Ring- The Fatima (Customizable Cushion Cut Center with Triple Pavé Band)
0.65 Carat1.00 Carat1.50 Carat2.50 Carat3.50 Carat5.00 Carat

Cubic Zirconia Engagement Ring- The Fatima (Customizable Cushion Cut Center with Triple Pavé Band)

From $1,042.53 USD
There isn't much to say about this engagement ring that isn't encapsulated in one word: "magnificent". It looks magnificent. And she'll feel magnificent when you slip The Fatima on her...
Quick view
Cubic Zirconia Engagement Ring- The Fatima (Customizable Emerald Cut Center with Triple Pavé Band)
0.33 Carat0.75 Carat1.00 Carat1.50 Carat2.50 Carat3.00 Carat4.00 Carat5.00 Carat

Cubic Zirconia Engagement Ring- The Fatima (Customizable Emerald Cut Center with Triple Pavé Band)

From $1,037.13 USD
There isn't much to say about this engagement ring that isn't encapsulated in one word: "magnificent". It looks magnificent. And she'll feel magnificent when you slip The Fatima on her...
Quick view
Cubic Zirconia Engagement Ring- The Fatima (Customizable Oval Cut Center with Triple Pavé Band)
0.50 Carat1.00 Carat1.50 Carat2.50 Carat3.00 Carat4.00 Carat5.00 Carat

Cubic Zirconia Engagement Ring- The Fatima (Customizable Oval Cut Center with Triple Pavé Band)

From $1,027.02 USD
There isn't much to say about this engagement ring that isn't encapsulated in one word: "magnificent". It looks magnificent. And she'll feel magnificent when you slip The Fatima on her...
Quick view
Cubic Zirconia Engagement Ring- The Fatima (Customizable Princess Cut Center with Triple Pavé Band)
0.40 Carat0.50 Carat0.75 Carat1.00 Carat1.25 Carat1.50 Carat2.00 Carat3.50 Carat5.00 Carat0.65 Carat

Cubic Zirconia Engagement Ring- The Fatima (Customizable Princess Cut Center with Triple Pavé Band)

From $999.83 USD
There isn't much to say about this engagement ring that isn't encapsulated in one word: "magnificent". It looks magnificent. And she'll feel magnificent when you slip The Fatima on her...
Quick view
Cubic Zirconia Engagement Ring- The Fatima (Customizable Radiant Cut Center with Triple Pavé Band)
0.33 Carat0.75 Carat1.00 Carat1.50 Carat2.50 Carat3.00 Carat4.00 Carat5.00 Carat

Cubic Zirconia Engagement Ring- The Fatima (Customizable Radiant Cut Center with Triple Pavé Band)

From $1,037.13 USD
There isn't much to say about this engagement ring that isn't encapsulated in one word: "magnificent". It looks magnificent. And she'll feel magnificent when you slip The Fatima on her...
Quick view
Cubic Zirconia Engagement Ring- The Fatima (Customizable Round Cut Center with Triple Pavé Band)
0.25 Carat0.50 Carat0.75 Carat1.00 Carat1.50 Carat2.00 Carat2.50 Carat3.00 Carat3.50 Carat

Cubic Zirconia Engagement Ring- The Fatima (Customizable Round Cut Center with Triple Pavé Band)

From $996.81 USD
There isn't much to say about this engagement ring that isn't encapsulated in one word: "magnificent". It looks magnificent. And she'll feel magnificent when you slip The Fatima on her...
Quick view
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US Size 10.50 Cubic Zirconia Rings

This product collection has the CubicZirconia.com rings, engagement rings and wedding bands that can be manufactured in a U.S. finger ring size of 10.50.

You can see all available cubic zirconia ring sizes here, and filter our rings product catalog by any specific US ring size number. 

Not sure what your finger ring size actually is? Click here for tips and/or order our ring sizing kit to check. We can also help you with sneaky ninja tips to find what her finger ring size is for a confidential surprise gift without her knowing what you're doing!

If you're outside the United States, Canada and Mexico-- which all use the U.S. ring sizing system used primarily on this website store-- then maybe you need our international ring size chart to convert your known international ring size into a U.S. ring size.