Description
TREMOLITE SPECIMEN
This is the polished gray-white tremolite specimen with green smaragdite. Dimensions: 3.7 x 3.0 x 0.4″ (9.4 x 7.5 x 1cm). Weight – 4.9oz (139 grams). Origin: Russia, Siberia.
Some information about tremolite:
Tremolite is a member of the amphibole group of silicate minerals. Tremolite forms by metamorphism of sediments rich in dolomite and quartz. Tremolite forms a series with actinolite and ferro-actinolite. Pure magnesium tremolite is creamy white, but the color grades to dark green with increasing iron content. It has a hardness on Mohs scale of 5 to 6. Nephrite, one of the two minerals of the gemstone jade, is a green variety of tremolite.
Tremolite occurs as a result of contact metamorphism of calcium and magnesium rich siliceous sedimentary rocks and in greenschist facies metamorphic rocks derived from ultramafic or magnesium carbonate bearing rocks. Associated minerals include calcite, dolomite, grossular, wollastonite, talc, diopside, forsterite, cummingtonite, riebeckite and winchite.
Tremolite was first described in 1789 for an occurrence in Campolungo, Piumogna Valley, Leventina, Ticino (Tessin), Switzerland.
