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Natural Diamonds

Engagement Rings

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Pittsburgh Showroom

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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1/2 Carat Circular Brilliant Cut Diamond - G SI1 - 0.53ct - 252017 - Diamonds By Rothschild

1/2 Carat Refined Circular Brilliant Cut Diamond - G SI1 - 0.53ct - 252017

3/4 Carat Round Cut Diamond - M I2 - 0.85ct - 255398 - Diamonds By Rothschild

3/4 Carat Refined Round Cut Diamond - M I2 - 0.85ct - 255398

3/4 Carat Pear Shape Cut Diamond - E SI2 - 0.80ct - 253605 - Diamonds By Rothschild

3/4 Carat Refined Pear Cut Diamond - E SI2 - 0.80ct - 253605

1 Carat Marquise Cut Diamond - M VVS2 - 1.01ct - 255320 - Diamonds By Rothschild

1 Carat Refined Marquise Cut Diamond - M VVS2 - 1.01ct - 255320

1/2 Carat Round Cut Diamond - H VVS2 - 0.55ct - 252940 - Diamonds By Rothschild

1/2 Carat Refined Round Cut Diamond - H VVS2 - 0.55ct - 252940

3/4 Carat Marquise Cut Diamond - D SI1 - 0.70ct - 252102 - Diamonds By Rothschild

3/4 Carat Refined Marquise Cut Diamond - D SI1 - 0.70ct - 252102

1/2 Carat Old Mine Cut Diamond - F VS2 - 0.55ct - 252009 - Diamonds By Rothschild

1/2 Carat Refined Old Mine Cut Diamond - F VS2 - 0.55ct - 252009

1/2 Carat Circular Brilliant Cut Diamond - H SI2 - 0.54ct - 252016 - Diamonds By Rothschild

1/2 Carat Refined Circular Brilliant Cut Diamond - H SI2 - 0.54ct - 252016

3/4 Carat Round Cut Diamond - J I1 - 0.72ct - 255496 - Diamonds By Rothschild

3/4 Carat Refined Round Cut Diamond - J I1 - 0.72ct - 255496

1 Carat Cushion Cut Diamond - I I2 - 1.01ct - 252066 - Diamonds By Rothschild

1 Carat Refined Cushion Cut Diamond - I I2 - 1.01ct - 252066

1 Carat Round Cut Diamond - G I2 - 0.93ct - 253603 - Diamonds By Rothschild

1 Carat Refined Round Cut Diamond - G I2 - 0.93ct - 253603

1/2 Carat Rose Cut Diamond - J I2 - 0.55ct - 252006 - Diamonds By Rothschild

1/2 Carat Rose Cut Diamond - J I2 - 0.55ct - 252006

3/4 Carat Princess Cut Diamond - L VS2 - 0.83ct - 253678 - Diamonds By Rothschild

3/4 Carat Refined Princess Cut Diamond - L VS2 - 0.83ct - 253678

1/2 Carat Circular Brilliant Cut Diamond - K I1 - 0.60ct - 252014 - Diamonds By Rothschild

1/2 Carat Refined Circular Brilliant Cut Diamond - K I1 - 0.60ct - 252014

1 Carat Princess Cut Diamond - J I2 - 1.03ct - 253762 - Diamonds By Rothschild

1 Carat Refined Princess Cut Diamond - J I2 - 1.03ct - 253762

3/4 Carat Round Cut Diamond - E I2 - 0.78ct - 255491 - Diamonds By Rothschild

3/4 Carat Refined Round Cut Diamond - E I2 - 0.78ct - 255491

1 Carat Round Cut Diamond - I I2 - 1.19ct - 255406 - Diamonds By Rothschild

1 Carat Refined Round Cut Diamond - I I2 - 1.19ct - 255406

>3 Carat Round Cut Diamond - F VS2 - 2.83ct - 249210 - Diamonds By Rothschild

3 Carat Refined Round Cut Diamond - F VS2 - 2.83ct - 249210

3/4 Carat Round Cut Diamond - J SI1 - 0.70ct - 232130 - Diamonds By Rothschild

3/4 Carat Refined Round Cut Diamond - J SI1 - 0.70ct - 232130

3/4 Carat Round Cut Diamond - G SI2 - 0.70ct - 242823 - Diamonds By Rothschild

3/4 Carat Refined Round Cut Diamond - G SI2 - 0.70ct - 242823

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

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

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

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

3/4 Carat Princess Cut Diamond - G VS1 - 0.70ct - 252939 - Diamonds By Rothschild

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

3/4 Carat Round Cut Diamond - K I2 - 0.75ct - 241553 - Diamonds By Rothschild

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

Variety of loose diamonds shapes for sale online

Explore More Natural Diamonds

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

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