Sapphirine/Anthophyllite

Sapphirine/Anthophyllite

The specimen is composed of two minerals,  Sapphirine and Anthophyllite. Sapphirine is a silicate of magnesium and aluminium, (Mg,Al)8(Al,Si)6O20  The mineral is formed in high temperature metamorphic rock, and the crystal colour is light to dark blue. Anthophyllite  Mg2Mg5Si8O22(OH)2   is an amphibole mineral, with a fibrous crystal habit, and may be classed as an asbestos mineral.