Perles en tourmaline noire, forme carré Acier inoxydable Shimmering reflections

Shimmering reflections

Lodolite quartz is a quartz containing various inclusions

It may contain other minerals or impurities that can create rich patterns

- Harlequin opal

Perles en tourmaline noire, forme carré Acier inoxydable Shimmering reflectionsBlack tourmaline beads in square cube shape. Color: Black Size: 4mm Country of origin: Madagascar Gemological information about tourmaline: Density: Between 2. 84 and 3. 40 Hardness: Between 7 and 7. 5 Crystal system: Trigonal Fracture: Subconchoidal to irregular Cleavage: None Polariscope: Anisotropic (restores all 90 except in the optical axis) Refractive index: Ne: 1. 603 to 1. 772 No: 1. 619 to 1. 778 Birefringence: 0. 013 to 0. 033 Chelsea