The hemimorphic asymmetry accounts for Hemimorphite's most striking characteristic: an electrical charge induced by changes in temperature or pressure. The phenomena is known as pyroelectricity where heated crystals will develop positive and negative charges at opposite ends of the crystal. Changes in pressure will result in similar charges and the phenomena is known as piezoelectricity. Discover @ www.multicolour.com or #gemstones
Green crystalline quartz is unknown in the gemological literature. Chrysoprase is a kind of green quartz but it is cryptocrystalline. We had a few small similar stones before but nothing like this and this one is a cat's eye too. Quartz sometimes shows stars but catseye's are much more rare. Probably the only one in the world of this color and size.