Sapphirine n. : Resembling sapphire; made of sapphire; having the color, or any quality of sapphire.

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Taxonomy
Sapphirine, colour, free encyclopedia, Mineral, dark blue, bluish, specimens, anhedral, tabular, aggregate, vitreous, crystals, Refractive index, rare mineral, magnesium, aluminium, purplish pink, search.

Defination from the web:
Sapphirine is a rare mineral, a silicate of magnesium and aluminium with the chemical formula (Mg,Al)8(Al,Si)6O 20 (with iron as a major impurity) ... Named for its sapphire-like colour, sapphirine is primarily of interest to researchers and collectors: well-formed crystals are ...