Feldspar (Moonstone)

Item Description

A VERY rarely seen Moonstone specimen from Sri Lanka. Moonstone is a variety of Feldspar that when rotated in the light, will show an "adularescence" effect, which causes a milky blue sheen or slight rainbow flash to appear on the surface . Moonstone shows a silvery or bluish iridescence, that is caused by the intergrowth of two different types of Feldspar with different refractive indexes. Perhaps the most important aspect to the piece is the fact that the crystal is good sized and well-formed, better than most I've seen from any world locality. If you're a Feldspar collector, or if you're interest in unusual (gem) crystals, do not pass this one up. From the collection of Colin Manlove.