- Toenail, 3.0 x 2.4 x 1.3 cm
- Oconee Co., South Carolina, USA
Sillimanite is a high temperature and high pressure aluminum silicate found in high-grade regional metamorphic rocks. Lustrous, parallel-growth, olive-brown sillimanite crystals are embedded in schist matrix on this fine and rich toenail specimen from a very uncommon South Carolina locality. Seldom available in any size from this locale. Ex. Carlton Davis Collection.