About Us
At Adamantine Minerals, we’re committed to being a reliable source for mineral specimens, no matter where you are in your collecting journey. Whether you're just starting out or you're a seasoned collector, we offer a wide range of specimens at various price points, from entry-level pieces to fine-quality selections.
We believe mineral collecting should be approachable and enjoyable for everyone. That’s why we focus on a transparent and educational approach to mineral sales, ensuring each specimen is presented with honesty and clarity. While many collector-focused businesses cater to specific audiences, we aim to complement the space by providing a diverse selection that balances quality with accessibility, so collectors can build exceptional collections at any budget.
With a background in geology and years of collecting experience, we bring both knowledge and enthusiasm to every specimen we offer. Our collection reflects a growing balance of affordable and high-end pieces, and we’re continually expanding to offer something of interest to experienced enthusiasts as well—without losing sight of our mission. As our business grows, our goal remains the same: to offer dependable service and carefully selected minerals that reflect the care, curiosity, and respect we have for the collecting community.
Mining Adventures Gallery!
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Lifting a piece of ledge in Middleville, NY!
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Celestine crystals in dolostone at Sylvania Minerals Quarry. November 2024.
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Digging for amethyst and smoky quartz at Crystal Park in Montana. August 2025.
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Jenna, Sam, and Jill waiting to enter the Herkimer Diamond Mine on a chilly April morning.
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Sam in the tailings pile at Crystal Grove Mine. June 2022.
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A tiny salamander at the Herkimer Diamond Mine with a Dunkin coffee cup for scale
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Some small quartz clusters we collected at Ron Coleman Mine in August of 2024!
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Jenna & Jill at Crystal Grove Mine after a day of mining in the rain!
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A freshly mined Herkimer Diamond from Diamond Acres Mine. 2023.
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Digging for quartz crystals at Ron Coleman Mine in 2024.
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A Herkimer Diamond in matrix straight out of the ledge. October 2024.
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Sam hiking in Kings Canyon National Park! June 2021.
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Jenna and Jamie on the first collecting trip to Diamond Hill Mine. July 2019.
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Entering the Herkimer Diamond Mine!
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Mining under a tarp on a rainy day at Ace of Diamonds Mine! October 2023.
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Our cat, Mochi, sleeping next to a pile of crystals!
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First find of the day at the Herkimer Diamond Mine. 2025.
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Exploring the A.E. Seaman Mineral Museum in Houghton, MI. January 2024.