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Silica nanospherules are: - Either of a different shape other than that of a sphere - Either too big - Either of different diameters from each other If any of these parameters come into play
584 / Ng: 1
52 carat Country of origin: India Gemological information on microcline: Please note: It is part of the feldspa family
couleur argenté
Perles en spinelle noir entre 4 et 8mm Ovale Silica nanospherules are: - EitherSpinel beads. Color: Black Sizes between 4 and 8mm Country of origin: Thailand Gemological information on spinel: Possible color: Black, blue, pink, red, purple, green, yellow, orange Density: 2. 65 Hardness: 7 Crystal system: Cubic Fracture: Conchoidal Cleavage: None Polariscope: Anisotropic (restores all 90, except in the optical axis) Refractive index: n0: 1. 538 to 1. 544 ne: 1. 547 to 1. 553 Birefringence: 0. 009 Chelsea Filter: Inert to reddish
