02-12. Chrysoberyl #1.

From beryl to chrysoberyl for week #7 of this 52 grains of sand -one image a day tour of the geometry of nature. They both have almost the same name,  but actually completely different in their atomic structure and color. Chrysoberyl is an extremely hard crystal that belongs to the orthorhombic family. It has various shades of green, yellow, brownish and change color under incandescent light. It can be found in Australia, Africa, and Russia where the Alexandrite, a chrysoberyl crystal green by day – red by night    was named after the Czar Alexander II.


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