Asbestos minerals consist of two large groups: serpentine and amphibole.

Asbestos minerals are divided into two large groups: serpentine and amphibole. There is only one type of asbestos derived from serpentine minerals, chrysotile, also known as white asbestos.

Asbestos is a general term applied to certain fibrous minerals long popular for their thermal resistance, tensile strength, and acoustic insulation.

Amphibole minerals include five asbestos species: amosite, crocidolite, tremolite, anthophyllite, and actinolite. Two of these are the most commercially valuable forms: amosite, or brown asbestos, and crocidolite, or blue asbestos. The other amphibole minerals are of little commercial importance.

Courtesy of http://www.mesorfa.org/about-meso/article14b.php

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