Sillimanite (fibrolite) is an aluminium silicate whose fibrous structure gifts many stones a silky cat's-eye; clean faceted material in violet-blues and greens is a genuine rarity for collectors. Sri Lanka and Myanmar are the classic origins; hardness 6.5–7.5.Each sillimanite at GEMIC Institute is natural, certified by our gemologists and filmed as the exact stone offered. Unique gems; worldwide tracked shipping and a 30-day return period.

See also: Sillimanite · Gemology Courses in Siem Reap, in English or French