- Dioptase, Quartz
- Toenail, 3.0 x 1.7 x 1.5 cm
- Brazzaville (Reneville; Djoue), Brazzaville Department (Reneville Department), Republic of Congo (Brazzaville)
Gemmy and lustrous, emerald-green dioptase crystals to 1.1 cm are AESTHETICALLY set on a column of a drusy quartz-coated quartz crystal from the famous Reneville deposit in the Republic of Congo. This EXCELLENT combination of dioptase on quartz is RARE from this locality. Material of this quality dates to the 1950s or 60s. Ex. George Elling Collection.