Geology and learning
The knowledge behind what we sell, in one place. How minerals form, how to read them, what treatments exist, and what a locality actually tells you. Grounded in geology
Learn how minerals actually form
Everything here is grounded in how minerals actually form and behave, written for people who want to understand what they own. Start anywhere; each guide stands on its own, and they connect where it helps.
Where to start
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Geological concepts
The science underneath it all: formation, crystal systems, hardness, and more.
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Treatments & authenticity
Common treatments, how to spot them, and how to tell natural from fake.
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Locality guides
Where minerals come from, and why a documented origin changes what a piece is worth.
From the journal
The Mineral Journal is where we go deeper: honest, plain-English guides to spotting treated stones, decoding trade names, and understanding how minerals form.
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Is your citrine real, or heat-treated amethyst?
Most "citrine" you see isn't citrine at all; it's heat-treated amethyst. Here's how to tell the difference, and why it matters.
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Are crystals safe in water?
Most crystals, polished pieces included, are fine for a rinse. Here's the honest, mineral-by-mineral truth about what actually needs to stay dry.
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What "AAA grade" really means
AAA, AA, gem grade: the letters look official, but there's no standard behind them. Here's what crystal grading really means, and how to judge quality yourself.
Know what you own.
Every piece we sell is documented to the standard these guides describe; species, origin, and treatment, stated plainly. The knowledge isn't separate from the product. It is the product.