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
  • Large Round Orange Spessartite Garnet
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  • Large Oval Orange Spessartite Garnet
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  • Natural Rubellite
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  • Natural Color Cushion Spessertite Garnet
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  • Natural Santa Maria Aquamarine
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  • Natural Cushion Violet Spinel
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  • Natural Color Cushion Sapphire
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  • Natural Lavender Cushion Spinel
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  • Oval Pink Sapphire
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  • Cushion Rubellite Tourmaline
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  • Cushion Pink Sapphire
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  • Natural Rectangular Cushion Pink Spinel
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  • Emerald Cut Blue Green Tourmaline
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  • Natural Cushion Peridot Pair
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  • 8.82cts. Cushion Tsavorite Garnet
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  • Oval Natural Gossular Garnet
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  • Queensland Boulder Opal Pair
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  • Blue Zircon Cushion Pair
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  • Emerald Cut Diamond
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  • Natural Fancy Orange-Brown Oval Diamond
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