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685 Birefringence: 0
From a strictly geological point of view
41 carat Country of origin: Congo Gemological information about malachite: Possible color: Light green to dark green with zoning Density: Between 3
003Filtre chelsea: InerteSpectre: Non observable / non diagnostiqueDifférents pays ou peut-être extraite la séraphinite: Russie
Perles en amazonite, forme carré facetté Donuts / disque / heichi 685 Birefringence: 0Amazonite beads. Color: Green Shape: Faceted square Size: 5mm Country of origin: Brazil Gemological information about Amazonite: Note: Part of the feldspa family, a variety of microcline. Possible color: From light green to dark green (pale green, apple green, dark green), green tending towards blue, can even go as far as light blue. Hardness: Between 6 and 6. 5 Crystal system: Triclinic Breakage: Irregular Cleavage: Perfect Polariscope: Anisotropic
