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PHYSICAL CHARACTERISTICS:
Color is tin-white to a steel gray which can tarnish to darker grays. Luster is metallic but the tarnish will often dull the luster. Transparency: Crystals are opaque. Crystal System is trigonal; bar 3 2/m Crystal Habits include pseudocubic rhombohedral crystals. More commonly found massive, botryoidal, lamellar and radiating. Cleavage is perfect in one direction (basal). Fracture is uneven. Hardness is 3 - 3.5 Specific Gravity is 6.6 - 6.7+(heavy for a metallic mineral) Streak is tin-white to gray. Associated Minerals include sphalerite, stibnite and nickeline. Other Characteristics: Does not have a garlic odor. Notable Natural Occurrences include Chihuahua, Mexico; Wolfe Co., Quebec, Canada and Kern Co., California, USA. Best Field Indicators are density, softness, color, crystal habits, lack of smell and associations. |
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more about information please click http://www.antimonynet.com
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