Friday, March 7, 2014

Serba Serbi Batu Opal (Kalimaya)

OPAL / KALIMAYA

Nama : Opal / Kalimaya
Kekerasan : 5.5 - 6 Mohs
Unsur Kimia : Hydrated silica. SiO2·nH2O
Struktur Kristal : Amorphous
Berat Jenis : 2.15
Index Bias : 1.450
Transparansi : Opaque - Transparent
Luster : Subvitreous to waxy
Daerah Penghasil : Indonesia, Australia, Afrika
Variasi Warna : Colorless, white, yellow, red, orange, green, brown, black, blue

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