Sunstone
(sun'-ston')
13th c.; ind-eur s(u)wen; Ger. stein , Slav. stena, Sansk. styayate
Feldspar exhibiting in certain directions a brilliant spangled appearance, which has led to its use as an ornamental stone, also called aventurine feldspar
Color
Shiny orange, brown to red
Chemical composition
Na(AlSi3O8)Ca(Al2Si2O8)
Hardness (Mohs scale)
6 - 6,5
Specific gravity
2,63 ±0,02
Refractive index
1,532 - 1,542
Optical character
Biaxial +