ametrine crystal from Anahi Mine, Bolivia isolated on white background

Ametrine: The Bicolor Quartz of Amethyst and Citrine

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ghost and mask tick canyon howlite cabochons

Tick Canyon Howlite: From Waste to Gem

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alien eye fluorite specimen

Alien Eye Fluorite Field Guide

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stibnite from Transylvania

Transylvania Minerals: Gothic Beauty

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Sulfur in sedimentary rocks

Sulfur: Properties, History and Uses

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Enterolith, alongside a copy of a 17th-century India (Mughal Period) round pill box adapted from a silver case, cast in lead-free pewter, electroplated with 24-carat gold and coated with a silver lacquer to create a two-toned effect.

Madstones: The Strange Folk Remedy for Rabies

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Red arsenic on matrix.

Meet Arsenic, the King of Poisons

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rough black obsidian

Black Gemstones: From Gloom to Glamour

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a piece of jet stone and a piece of obsidian for comparison

Jet Stone: History and Identification

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carnelian tumbled gemstones

Carnelian: 10 Facts About This Colorful Gemstone

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