Collection: Gemstones

Susan Kottemann specializes in curating precious stones from across the globe including tanzanite, spinel, and diamonds from Africa, rubies from Burma, and sapphires from Sri Lanka. With a keen eye, Susan Kottemann also harbors a unique talent for creating the most perfectly matched gem pairs available on the market. Whether you're searching for a single stone or a pair, browse our collection of boulder opals, spessartite garnets, Santa Maria aquamarines, and violet spinels to see why our gems are some of the finest in the industry.

Looking for a specific gemstone? Contact us to let us know what you're looking for!

27 products
  • Natural Fancy Intense Pink Diamonds
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  • Round Brilliant Cut Brown Diamond Pair Unavailable
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  • Natural Fancy Vivid Yellow Round Diamond
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  • Natural Oval Rubellite Tourmaline
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  • Oval Diamond
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  • Pink Sapphire
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  • Pair of Cushion-cut Cabochon Indigolite
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