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. the origin of this specimen is from the Malene Supracrustal Volcanics, about 100Km ESE of Godthaab/Nuk, West Greenland.