Green Sillimanite
Oct. 4, 2024
3.69 cts SILLIMANITE . IF Rare Sillimanite Gems Wisconsin Geological & Natural History Survey » Sillimanite Green Sillimanite
Oct. 4, 2024
3.69 cts SILLIMANITE . IF Rare Sillimanite Gems Wisconsin Geological & Natural History Survey » Sillimanite Green Sillimanite