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60 carat Country of origin: Australia Gemological information about mookaite jasper: Note: Mookaite Jasper is not a jasper but a variety of sedimentary rock
20 carat Country of origin: Madagascar Gemological information on labradorite: Possible colors: Background color: colorless to dark gray
658 / ne: 1
USA Rhodonite can be confused with: - Rhodochrosite - Massive grossular - Thulite - Glass - Tourmaline
often presence of yellow
Hypersthène 27 obsidienne noire 60 carat Country of origin:Cabochon en hypersthne. Couleur: Gris Forme: Goutte Taille: 43,84 x 36,60mm Poids en gramme: 20,12g Poids en carat: 100,60 carat Pays d'origine: Canada Informations gemmologiques sur l'hypersthne: Couleur possible: Gris, vert, brun, noir Densit: Entre 3,43 et 3,90 Duret: Entre 5 et 6 Systme cristallin: Orthorombique Cassure: Irrgulire Clivage: Parfait Polariscope: Anisotrope Indice de rfraction: np: 1,686 1,755 nm: ? ng: 1,703 1,772 Birfringence:
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