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Ships within 48 hours · Estimated delivery Aug 22 - Aug 27
Reserve from the case
Ships within 48 hours · Estimated delivery Aug 22 - Aug 27
Family: Microcrystalline Quartz
Forme: Galet / nuggets de plus grande taille
Carat weight: 112
Poids en gramme: 258g
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Perles en spinelle noir entre 4 et 8mm Sizes:4mm Family: Microcrystalline QuartzSpinel 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
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