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Ships within 48 hours · Estimated delivery Sep 6 - Sep 11
subconchoidal to coarse-grained
74mm diameter
Couleur: Différentes nuances de brun
Elle contient plus de 85% de silice et d'autres minéraux
25gPoids en carat: 61
Perles en calcite bleue entre 6 et 10mm Sizes:6mm subconchoidal to coarse-grainedBlue calcite beads. Color: Blue Size between 6 and 10mm Country of origin: Argentina Gemological information on blue calcite Possible colors: Colorless, white, yellow, green, blue, red, orange, brown, gray, black, magenta Density: Between 2. 60 and 2. 80 Hardness: 3 Crystal system: Trigonal Fracture: Conchoidal Cleavage: Perfect Polariscope: Anisotropic, restores every 90, except in the optical axis Refractive index: Ne: 1. 486 to 1. 550 No: 1. 650 to
