Rosenquarz-Schale | Madagaskar Apophyllite 000 at an auction at

000 at an auction at Christie's in London in October 2020

Additional Information: Quartz is one of the most common minerals

coarse-grained variety of the silica mineral quartz

This is an unusually large ammonite

Rosenquarz-Schale | Madagaskar Apophyllite 000 at an auction atOrigin: Madagascar Size: H24. 5cm W53cm D40cm Weight: 31. 7 kg Description: Cut and polished in the shape of a bowl that has a rose tint. The floor is flat and can be displayed. Additional Information: Quartz has attracted attention from early times; Water clear crystals were known to the ancient Greeks as krystallos hence the name crystal or, more accurately, rock crystal, which was used for this variety. Quartz comes in virtually all colors.