The stone's transparency and color intensity vary with manganese concentration

Double-terminated quartz forms when a crystal is free to grow from both ends rather than anchored at a base

A moldavite and clear quartz pendant in solid

The band is solid

In the chakra tradition it corresponds to the heart chakra

Black Tourmaline Sphere Polished Size:2"D The stone's transparency and colorA perfect black sphereopaque, cool, dense in the hand, the mineral's striations visible as faint lines in direct light. Black Tourmaline (Schorl) is a boron silicate mineral in the Tourmaline group, Mohs 77. 5, its black color produced by high iron content in the complex crystal structure. Polishing a sphere from Tourmaline requires navigating the mineral's natural cleavage planes; the finished sphere reveals the stone's internal striations across its