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Black Tourmaline crystal with natural termination
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Chalcopyrite is a copper iron sulfide
The book also contains full color photographs of some of the finest collections of Montana Moss Agate in the world
CHI198jr Chinese Agate, Middle-Class Mine Zodiac Stones Black Tourmaline crystal with naturalThis is a polished specimen featuring banded agate in colors of yellow, red, white, and blue. 12. 6 cm x 6. 1 cm 0. 80 lbs Agates from the Middle Class mine show a broad range of colors including red, yellow, purple, brown, blue, and black. Agates from the Middle Class mine also often contain druzy pockets with hematite and calcite crystals. Agates from this mine also contain a higher percentage of heat and stress fractures from the mining process and