flint rock

Flint Rock: Formation and Properties

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pyrite mineral

Pyrite Mineral: Fool’s Gold Shines Bright

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pyrite mineral

Flint and Pyrite: Fire-Making Minerals

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history of birthstones includes necklaces like this heart shaped pendant necklace set with birthstones for family members

History of Birthstones: Origin & Evolution

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onyx

Onyx Gemstone: A Field Guide Overview

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peridot

Peridot Gemstone: Origins, Lore & Uses

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spinel gemstone perched on matrix

Spinel Gemstone: Brilliant & Durable

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rough green beryl green stone

8 Must-Collect Green Rocks

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minnesota thomsonite

Minnesota Thomsonite: Rare & Radiant

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burrow creek agate is a favorite on Purple crystals and gemstones lists

Guide to Purple Crystals and Gemstones

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