Orthoclase - image 1
Photo by Jeffrey A. Scovil

Orthoclase

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Orthoclase, 7-cm doubly terminated crystal from the Itrongay mine, Benenitra-Betroka, Madagascar. Photo by Jeff Scovil.

Product details

SpeciesOrthoclase
Added on02/13/2026
LocalityMadagascar, Anosy, Betroka District
Publications
  • Mineralogical Record Private Mineral Collections In Italy page 36
Current owner
Tiziano Bonisoli

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Orthoclase
Mineral guide
Learn about Orthoclase
classic potassium feldspar with colors from colorless to pink; famed for Carlsbad, Baveno and Manebach twins and Alpine adularia in clefts.
Orthoclase
Regional guide
Orthoclase from Betroka District
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Locality guide
Betroka District
Betroka District, Madagascar — renowned for gem-quality sanidine feldspar from Itrongay and rare pegmatite minerals, prized by collectors, transparency and col…