POLDERVAARTITE, CALCITE (Ref: 22782)

A beautiful specimen of poldervaartite decorated with calcite from the famous NChwaning Mines, South Africa. Poldervaartite is rare Ca-dominant analogue of olmiite. We acquired the specimen as poldervaartite, but laboratory analyses could confirm which member of the poldervaartite–olmiite series it belongs to. It features well formed crystals in radial sprays. They have an elegant posture and well defined shape. The poldervaartite crystals are lustrous with pleasing cream color and strong sparkling appearance. Water clear, colorless, lustrous and sharp calcite crystals add a nice accent. They grow in a parallel cluster of perimorph cast. They are doubly terminated. Poldervaartite forms an excellent focal point at the top and the dark matrix gives a strong contrast. In excellent condition – small calcite part on the side is moving but it is stable. On acrylic base., Magnificent!,