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ORTHOCLASE                               NATURAL COLOR                              Hardness 6

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20.38 cts. yellow orthoclase emerald cut single 

15.5 x 15.3 x 13.3 mm.

Eye clean. Enhancement: none (N) Untreated

stone PRICE    USD 399 .00 

ref: Oye2038   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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