mineral

Sugilite

Sugilite [KNa2(Fe,Mn,Al)2Li3Si12O30]

Hardness: 5.5-6.5 on Mohs scale; Color: typically bright purple to violet, occasionally pink or reddish; Luster: vitreous to dull; Crystal structure: hexagonal; Cleavage: none; Specific gravity: 2.74-2.80

Hardness: 5
Luster: vitreous to dull

Identified July 1, 2026More mineral →

Explore Sugilite in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Formation & geological history

Formed in unique alkaline igneous environments, specifically through hydrothermal processes or secondary alterations within manganese-rich silicate deposits. Significant deposits are found in the Wessels Mine in South Africa.

Uses & applications

Predominantly used as a gemstone in high-end jewelry, lapidary arts, and as a highly sought-after specimen for mineral collectors.

Geological facts

First discovered in 1944 by Japanese mineralogist Ken-ichi Sugi, it wasn't until the 1979 discovery of the massive purple deposit in South Africa that it became a popular gemstone.

Field identification & locations

Identify by its distinctive 'royal' purple color and waxy to vitreous luster. It is rarely found in nature outside of Southern Africa. Collectors should look for intense saturation and minimal matrix.