Characteristics of Sugilite:

Chemical Name: Potassium, sodium lithosilicate

Formula: KNa₂(Fe,Mn,Al)₂Li₃Si₁₂O₃₀

Colors: Pink, brown-yellow, purple

Structure: Hexagonal

Hardness: 5.5-6.5

Specific Gravity: 2.73-2.79

Refractive Index: 1.60-1.61

Lustre: Vitreous

Streak: White

Locations: Canada, Japan, South Africa, Italy

What is Sugilite? 

Sugilite was discovered in 1944, but it was only recognized as a mineral in 1976. It is most commonly found in massive or granular form, and rarely found as crystals; when crystals do occur, they are small- less than 2cm across. Its color can be pale to deep pink, brownish-yellow, or purple, with deep hues of the latter commanding the most value. It is always cut en cabochon when used a gemstone, while pebbles are sometimes polished in rock tumblers. Sugilite is named after its co-discovered, Japanese petrologist Ken-ichi Sugi.