Peristerite Value, Price, and Jewelry Information

Moonstone (iridescent peristerite-oligoclase feldspar) (Chupa Pegmatite Field, Mesoproterozoic, 1.75 to 2.10 Ga; at or near Chupa Bay, northwestern Karelia, far-nw Russia) by James St. John, on Flickr


Peristerite is primarily oligoclase with a complex mixture of feldspars. It has iridescence that is either blue or white.

Peristerite Information

Data Value
Name Peristerite
Is a Variety of Albite
Colors White, blue.
Crystallography Triclinic.
Refractive Index 1.531-1.550
Luster Vitreous.
Hardness 6-6.5
Fracture Conchoidal, uneven, splintery
Specific Gravity 2.62-2.67
Birefringence 0.007-0.011
Cleavage Perfect 2 directions
Transparency Transparent.
Absorption Spectrum Not diagnostic.
Phenomena Schiller.



Biaxial (-). 2V = 82°.

Optic Sign Biaxial -


Compositions in the calcic oligoclase range (Ab76) cool and unmix to an inhomogeneous mixture of two feldspars, producing a Schiller, which in the case of peristerites is white or bluish. The effect seems to emanate within the body of the feldspar as a kind of glow.


Peristerite is from the Greek word peristera, meaning pigeon.


Peristerite is well known from Ontario, Canada, where it is very abundant. It is also found at Kioo Hill, Kenya: S.G. 2.63; a=1.531: β= 1.535; γ= 1.539.