quartz specimen on black background quartz is a seven on the mohs scale of hardness

What is the Mohs Scale of Hardness?

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what-is-anagate

What is an Agate?

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sodalite

Sodalite Mineral Guide: Formation & Locations

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Russian hematite

Hematite Mineral: A Classic Iron Oxide Explained

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Amethyst, February birthstone, purple quartz crystals

7 Stones To Relieve Stress

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amethyst crystal specimen

Amethyst Meaning & Uses

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ametrine crystal from Anahi Mine, Bolivia isolated on white background

Ametrine: Unique Bicolor Quartz

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amethyst cut using the faceting pattern called dianes oval

Faceting Focus: Diane’s Oval

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mica sample

Mica: A Shimmering Sheet Mineral

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calcite is identified in this keokuk geode

A Calcite Identification Guide

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