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RM1687   Mellite and calcite

Mellite, also called xylocriptite or honeystone, is an organometallic compound. It is an aluminum salt of the melitic acid; that is, an aluminum benzene-hexacarboxylate hydrate with a chemical formula Al2C6(COO)6·16H2O. This is a rare rare secondary mineral in lignite deposits. In this sample we can observe rich facets and transparence. Nice specimen. Fluorescent under SW-UV.

Size: 5.3 x 4.5 x 3.5 cm.
Main crystal: 18 x 10 mm
Fluorescent under short wave UV
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