Oregon sunstone — specimen 0447, photo © NMNHS
Oregon sunstone — specimen 0447
Weight: 0.53 ct; size: 6.03 | 4.12 | 2.88 mm; shape: octagon; colour: light reddish orange; very slightly brownish; clarity: eye clean; cut: good; treatment: none.
Very clean specimen; good step cut style. Source: Gary Eisenberg, Knoxville, Tennessee.
More information from ‘Classification’
A feldspar with copper inclusions; has a composition of about 70% anorthite and 30% albite; occurs in Oregon, USA.