peristerite
peristerite

Peristerite Value, Price, and Jewelry Information


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

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

peristerite
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

Comments

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.

Name

Peristerite is from the Greek word peristera, meaning pigeon.

Occurrence

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: = 1.535; = 1.539.


Joel E. Arem, Ph.D., FGA

Dr. Joel E. Arem has more than 60 years of experience in the world of gems and minerals. After obtaining his Ph.D. in Mineralogy from Harvard University, he has published numerous books that are still among the most widely used references and guidebooks on crystals, gems and minerals in the world.

Co-founder and President of numerous organizations, Dr. Arem has enjoyed a lifelong career in mineralogy and gemology. He has been a Smithsonian scientist and Curator, a consultant to many well-known companies and institutions, and a prolific author and speaker. Although his main activities have been as a gem cutter and dealer, his focus has always been education. joelarem.com

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