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191 results found with "Minerals"

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Limonite

Limonite is an iron hydroxide with a characteristic brownish yellow colour. It commonly forms during alteration of other iron-bearing minerals or rocks....

Diamond

Diamonds are the hardest minerals. This is a ‘boart’ diamond - it is crystalline, fractured and discoloured and is not gem quality....

Malachite and azurite

Donated by Mr SS Bastard. Collected at East Wheal Russel Mine near Tavistock. Copper occurs as green malachite and blue azurite in this specimen. Both minerals form through weathering of...

Fluorite

A specimen of fluorite. Collector and collection location unknown....

Quartz

Gold donated by WH Reed in 1884....

Cassiterite

Recorded in accessions register as ‘Tin Ore. Dartmoor’. Donated by Mr George Sparke. Collected on Dartmoor....

Gold

Gold donated by WH Reed in 1884....

Gold

Gold donated by WH Reed in 1884....