Asbestos is a naturally occurring silicate mineral with long, thin fibrous crystals. In 2006, 2.3 million tons of asbestos were mined worldwide, in 11 or 12 countries. Russia was the largest producer with about 40.2% world share followed by China (19.9%), Kazakhstan (13.0%), Canada (10.3%), and Brazil (9.9%). Six minerals are defined as “asbestos” including: chrysotile, amosite, crocidolite, tremolite, anthophyllite and actinolite.
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