Moonstone

A translucent variety of feldspar with a chatoyant quality, that is to say, having a changeable, undulating pearly lustre. It is either colourless or bluish-white and when cut en cabochon shows bluish gleams

Moonstone is not excessively expensive and being moderately rare is a good investment. The finest stones are those of a slightly bluish tint, reminiscent of the colour of the moon, hence the name.

It comes mainly from Burma, Ceylon, Madagascar, Brazil and to a lesser extent Norway and Switzerland.

Techinical Specification

Name	Moh's	Specific Gravity	Structure	Cleavage	Refractive Index	Double	Disp.	Pleochro	Fluorescence
Moon stone	6+	2.56-2.62	Monoclinic	Perfect	1.520-1.525	-0.005	0.012	None	Weak