Technical Type: Manganoan Sugilite Chem: (K, Na) (Na Fe3+ ) 2(Li2 Fe3+) Si12 O30 Crystal: Hexagonal (crystals are quite rare) Hardness: 6.0 - 7.5 (Mohs) Specific Gravity: 2.74- 2.80 Refractive Index: 1.607-1.610 Optical: Uniaxial negative Fluorescence: None Toughness: Very good Cleavage: None Color: Lilac to Plum (including shades of Magenta, Purple and Red Violet) Luster: Vitreous Transparency: Opaque to semi-translucent Associated minerals: Albite, Pectolite, Titanite, Allanite, Zircon, Apatite Origin: Khalahari Desert, Northern South Africa Back to contents Colors and Patterns Cut Stones Jewelry Links Metaphysical/Healing Ordering info Links Page last updated August 22, 1999