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ORTHOCLASE                               NATURAL COLOR                              Hardness 6



26.06 cts. yellow orthoclase emerald cut single 

19 x 17.9 x 12.5 mm.

 Eye clean. Enhancement: none (N) Untreated

stone PRICE  USD 1200.00 

ref: Oye2606   ORIGIN: Madagascar


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General Information

 Chemical Formula: KAlSi3O8
 Composition: Molecular Weight = 278.33 gm
   Potassium 14.05 %  K    16.92 % K2O
   Aluminium   9.69 %  Al   18.32 % Al2O3
   Silicon  30.27 %  Si   64.76 % SiO2
   Oxygen   45.99 %  O
             ______        ______
             100.00 %      100.00 % = TOTAL OxIDE
 Empirical Formula: KAlSi3O8
 Environment: Intrusive and extrusive igneous, and metamorphic rocks.
 IMA Status: Approved IMA 1960
 Locality: Common world wide occurrences.  Madagascar
 Name Origin: From the Greek orthos - "right" and kalo -" I cleave" in allusion to the mineral's right angle of good cleavage.
 Synonym: Adularia





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