Laboratory grown in Germany.
Highly refined bismuth forms these interesting "hopper" crystals when grown under laboratory conditions. The colors are formed by a thin oxidation layer. Although these crystals are not found in nature, their appearance is so exceptional and unusual, we wanted to present them here. Bismuth is a strange element. It is the most diamagnetic (opposes magnets) of all the elements, and some scientists have noted that it doesn't quite react normally to gravity.
Synthetically grown.