Albite is just one of six species within the plagioclase feldspar series. Each species is based on its albite and anorthite content: albite itself has got the highest albite content. It is almost always white, though gems in many cases are colourless. Peristerite, an albite-oligoclase mix, has blue sheen, like moonstone.
The very best periserite is from Canada.
The very best periserite is from Canada.
