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20851 - Lustrous Titanite (Sphene) Crystals - Imilchil Mine Morocco Euloma Gold and arsenic occur as

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Description

Gold and arsenic occur as a coupled substitution in the pyrite structure

High quality specimen

Not restored or prepared

Magnificent teeth of the Hadrosaurid dinosaur Brachylophosaurus

20851 - Lustrous Titanite (Sphene) Crystals - Imilchil Mine Morocco Euloma Gold and arsenic occur asTitanite, or sphene, is a calcium titanium nesosilicate mineral, CaTiSiO5. Trace impurities of iron and aluminium are typically present. Also commonly present are rare earth metals including cerium and yttrium; calcium may be partly replaced by thorium.

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