WebThe color varies from green to yellow. It has a Mohs hardness of 4 to 5 and a specific gravity of 8.5 to 9.5, quite high for a nonmetallic mineral. Bismite is a secondary oxidation … WebTongue color changes . The tongue's papillae (tiny, rounded projections) may become discolored if a person smokes or chews tobacco, eats certain foods or vitamins, or has colored bacteria growing on the tongue. Black discoloration on the top of the tongue may occur if a person takes bismuth preparations for an upset stomach. Brushing the tongue ...
Bismuth Gem Guide and Properties Chart - Gemstones
WebPhysical Properties of Bismuth Cleavage: {0001} Perfect Color: Silver white, Pinkish white, Red. Density: 9.7 - 9.8, Average = 9.75 Diaphaneity: Opaque Fracture: Uneven - Flat … WebA. likely to be diagnostic only if the mineral is hard enough to scratch porcelain B. more variable than the color in hand sample among crystals C. less variable than the color … how to center caption in latex
Topaz Uses and Properties of the Mineral and Gem - Geology
http://geologyscience.com/minerals/bismuth/ WebBismuthinite is a mineral consisting of bismuth sulfide ( Bi 2 S 3 ). It is an important ore for bismuth. The crystals are steel-grey to off-white with a metallic luster. It is soft enough to be scratched with a fingernail and rather dense. Bismuthinite forms a series with the lead, copper, bismuth mineral aikinite ( Pb Cu Bi S 3 ). [3] WebTopaz is a rare silicate mineral with a chemical composition of Al 2 SiO 4 (F,OH) 2. It is best known for being these four things: one of the most popular colored stones. number "8" in the Mohs Hardness Scale. a birthstone for the month of November. a gemstone of many colors. michael and chrystal slosson