Saturday, February 9, 2013

Rare Alexandrite Specimen

Alexandrite Specimen
High quality alexandrite specimen weighing 41.11 cts, from Tanzania. This specimen will cut several large alexandrites, hence the relatively high value.

Chrysoberyl crystalizes in the orthorhombic system and is often found as flat prismatic crystals. Some crystals, like the pictured alexandrite from Tanzania are twinned and known as trillings, where the crystals inter grow and form flowers or cyclic twins that give the false appearance of hexagonal symmetry. Another feature is the stepped growth lines which are clearly visible on the surface of the crystal.

No comments: