Actinolite Cranston Rhode Island
Actinolite is an intermediate member in a solid-solution series between magnesium-rich tremolite. Like tremolite, asbestiform actinolite is regulated as asbestos. Actinolite is commonly found in metamorphic rocks, such as contact aureoles surrounding cooled intrusive igneous rocks. It also occurs as a product of metamorphism of magnesium-rich limestones. The old mineral name uralite is at times applied to an alteration product of primary pyroxene by a mixture composed largely of actinolite. The metamorphosed gabbro or diabase rock bodies, referred to as epidiorite, contain a considerable amount of this uralitic alteration. Some forms of asbestos are formed from fibrous actinolite, the fibres being so small that they can enter the lungs and damage the alveoli. Some forms of actinolite are used as gemstones. One is nephrite, one of the two types of jade (the other being jadeite, a variety of pyroxene).
Size: 3600px × 4992px
Photo credit: © Phil Degginger / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: 2, 5si8o22, actinolite, ca2, cranston, crystal, crystals, fe, geology, inosilicate, island, jade, mg, mineral, minerals, nephrite, rhode, rock, rocks, specimen, specimens
