tetrahedral

but aragonite which forms within caves

It is a nice dark gray color and is full of small holes (the small black specks in the pictures)

The Lead–Zinc deposits of Madan Ore Field (Southwest Rhodope Mountains) were operated by the Turks in the Middle Ages

cubic and crystallized pyrite matrix and tiny terminated quartz crystals

Raw Pink Topaz Crystal | Natural Stone | 1.37 grams 6.8ct. | Thomas Range, Utah DOTW tetrahedralAn outstanding gem quality, glassy clear topaz crystal from Thomas Range, Utah. This crystal is a lovely soft pink and is of good size and clarity. Topaz is known as a spiritual rejuvenation gemstone. Great for meditation, Topaz helps to balance emotions, calm passions, stimulate creativity. It also releases tension and replaces negativity with joy and love. Topaz is associated with the throat chakra. Product Type: Topaz Crystal Approx Weight (per