crystals and minerals exhibited the national history museum london

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Ancient crystals and minerals exhibited at the National History Museum in London Royalty Free Stock Photo

Crystals and minerals exhibited at the National History Museum in London Royalty Free Stock Photo

Crystals and minerals exhibited at the National History Museum in London

In geology and mineralogy, a mineral or mineral species is, broadly speaking, a solid chemical compound with a fairly well-defined chemical composition and a specific crystal structure, that occurs naturally in pure form. Some natural solid substances without a definite crystalline structure, such as opal or obsidian, are more properly called mineraloids.[