Finished Quintet ge cutting design in smoky quartz.

Gem Cutting: How to Facet a Large Quartz Gemstone

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ametrine crystal from Anahi Mine, Bolivia isolated on white background

Ametrine: The Bicolor Quartz of Amethyst and Citrine

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Wishing Stones: Gemstone Lore & Legend

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quartz mineral identification

How to Identify Quartz Crystals

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Montana’s Dryhead fluorescent agate shows a dramatic color shift when short-wave UV light excites the uranyl ions.

Fluorescent Agate: Why Some Agates Glow Under UV Light

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Under UV light, an otherwise drab rock colorfully glows from within because of its fluorescent mineral properties

Mineral Properties That Seem Like Magic

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boulder opals from australia illustrate the beautiful colors that come form how is opal formed

How Is Opal Formed? The Science Behind Its Colors

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afghanite uv rocks specimen

UV Rocks: A Guide to Fluorescent Minerals

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Vesta, an asteroid included in the notable asteroid space rocks

Asteroid Belt Rocks: Clues to Earth’s Formation

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An artist’s depiction of a meteoroid beginning to burn up upon entry into the Earth’s atmosphere.

Meteoritics: The Science of Meteorites

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