Quartz is a silicon dioxide crystal with a hardness of 7. Its crystal system is hexagonal (trigonal), and it is among the most abundant of [...]
Site Designed by Think-Box Media
Copyright © 2013 Fine Mineral Specimens; Crystals; Gems and Minerals; Tourmaline; Calcite; Topaz; Aquamarine; Wholesale Minerals; Quartz; Beryl; Emerald; Ametrine; Amethyst. All Rights Reserved.