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American Diamonds - Refined

Discover ethically refined American diamonds selected for beauty, brilliance, and exceptional light performance.

These are natural diamonds originally sourced within the United States and returned to the market through a vertically integrated supply chain. Each stone has been hand-selected, expertly re-cut to optimize light performance and modern proportions, and independently regraded by the GIA after re-cutting.

American Diamonds — Refined are not lab-grown. They are not newly mined. They are pre-loved natural stones — given a second life with enhanced brilliance, full traceability, and no new extraction required. The most responsible luxury is one that honors what already exists.

This collection is exclusive to Diamonds by Rothschild, Pittsburgh — available in-showroom at the historic Clark Building and online with free insured nationwide delivery.

Every stone in this collection comes with a GIA grading report and can be set into a custom engagement ring, pendant, or piece of your choosing. Free consultations available in-person or virtually.

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View 217 items
3/4 Carat Round Cut Diamond - H VS2 - 0.81ct - 240971 - Diamonds By Rothschild
 
New

3/4 Carat Refined Round Cut Diamond - H VS2 - 0.81ct - 240971

$1,905.12
1/2 Carat Princess Cut Diamond - H I2 - 0.68ct - 254088 - Diamonds By Rothschild
 
New

1/2 Carat Refined Princess Cut Diamond - H I2 - 0.68ct - 254088

$544.00
1 Carat Round Cut Diamond - I SI2 - 0.95ct - 254050 - Diamonds By Rothschild
 
New

1 Carat Refined Round Cut Diamond - I SI2 - 0.95ct - 254050

$1,900.00
3/4 Carat Princess Cut Diamond - G VS1 - 0.70ct - 252939 - Diamonds By Rothschild
 
New

3/4 Carat Refined Princess Cut Diamond - G VS1 - 0.70ct - 252939

$1,960.00
3/4 Carat Round Cut Diamond - K I2 - 0.75ct - 241553 - Diamonds By Rothschild
 
New

3/4 Carat Refined Round Cut Diamond - K I2 - 0.75ct - 241553

$750.00
3/4 Carat Round Cut Diamond - E I2 - 0.73ct - 241552 - Diamonds By Rothschild
 
New

3/4 Carat Refined Round Cut Diamond - E I2 - 0.73ct - 241552

$1,168.00
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New

3/4 Carat Refined Circular Brilliant Cut Diamond - H SI1 - 0.88ct - 241548

$1,584.00
3/4 Carat Round Cut Diamond - K VS1 - 0.76ct - 252937 - Diamonds By Rothschild
 
New

3/4 Carat Refined Round Cut Diamond - K VS1 - 0.76ct - 252937

$1,216.00
1/2 Carat Round Cut Diamond - E VS1 - 0.56ct - 252008 - Diamonds By Rothschild
 
New

1/2 Carat Refined Round Cut Diamond - E VS1 - 0.56ct - 252008

$1,288.00
1/2 Carat Marquise Cut Diamond - E SI2 - 0.50ct - 240461 - Diamonds By Rothschild
 
New

1/2 Carat Refined Marquise Cut Diamond - E SI2 - 0.50ct - 240461

$1,428.00
3/4 Carat Circular Brilliant Cut Diamond - I VS1 - 0.84ct - 240239 - Diamonds By Rothschild
 
New

3/4 Carat Refined Circular Brilliant Cut Diamond - I VS1 - 0.84ct - 240239

$2,091.60
1 Carat Round Cut Diamond - G I1 - 0.92ct - 238232 - Diamonds By Rothschild
 
New

1 Carat Refined Round Cut Diamond - G I1 - 0.92ct - 238232

$1,913.60
1 Carat Round Cut Refined Diamond - I SI2 - 1.07ct - 252092 - Diamonds By Rothschild
 

1 Carat Round Cut Refined Diamond - I SI2 - 1.07ct - 252092

$2,782.00
1/2 Carat Round Cut Refined Diamond - H VS2 - 0.56ct - 252013 - Diamonds By Rothschild
 

1/2 Carat Round Cut Refined Diamond - H VS2 - 0.56ct - 252013

$896.00
1/2 Carat Old Mine Cut Diamond - I I1 - 0.57ct - 252011 - Diamonds By Rothschild
 

1/2 Carat Old Mine Cut Diamond - I I1 - 0.57ct - 252011

$570.00
2 Carat Round Cut Recycled Diamond - M I2 - 1.82ct - 249074 - Diamonds By Rothschild
 

2 Carat Round Cut Recycled Diamond - M I2 - 1.82ct - 249074

$3,822.00
1 Carat Round Cut Post Consumer Diamond - H SI1 - 1.06ct - 249048 - Diamonds By Rothschild
 

1 Carat Round Cut Post Consumer Diamond - H SI1 - 1.06ct - 249048

$3,604.00
1 Carat Emerald Cut Recycled Diamond - H VVS2 - 1.16ct - 251046 - Diamonds By Rothschild
 

1 Carat Emerald Cut Recycled Diamond - H VVS2 - 1.16ct - 251046

$5,684.00
1 Carat Round Cut Post Consumer Diamond - H I1 - 1.07ct - 250982 - Diamonds By Rothschild
 

1 Carat Round Cut Post Consumer Diamond - H I1 - 1.07ct - 250982

$2,461.00
1 Carat Round Cut Recycled Diamond - O-P I1 - 1.21ct - 250053 - Diamonds By Rothschild
 

1 Carat Round Cut Recycled Diamond - O-P I1 - 1.21ct - 250053

$1,694.00
2 Carat Round Cut Recycled Diamond - G SI2 - 1.92ct - 251094 - Diamonds By Rothschild
 

2 Carat Round Cut Recycled Diamond - G SI2 - 1.92ct - 251094

$10,944.00
1 Carat Princess Cut Post Consumer Diamond - I VS1 - 1.03ct - 251093 - Diamonds By Rothschild
 

1 Carat Princess Cut Post Consumer Diamond - I VS1 - 1.03ct - 251093

$4,017.00
2 Carat Round Cut Recycled Diamond - I VS1 - 2.01ct - 251092 - Diamonds By Rothschild
 

2 Carat Round Cut Recycled Diamond - I VS1 - 2.01ct - 251092

$20,100.00
1 Carat Round Cut Recycled Diamond - O-P VS1 - 1.01ct - 241557 - Diamonds By Rothschild
 

1 Carat Round Cut Recycled Diamond - O-P VS1 - 1.01ct - 241557

$2,121.00
Variety of loose diamonds shapes for sale online

Explore More Natural Diamonds

Our hand-selected collection of natural diamonds are sustainable, and ethically sourced.

View All Diamonds

The Rothschild Letter

Quiet dispatches on craft, stones, and ceremony.

Occasional notes from our workshop — new arrivals, private previews, and the stories behind the pieces. Never more than twice a month.