Batu Opal, Kalimaya ( Opal )

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Batu Opal, Kalimaya ( Opal ) merupakan Jenis batu permata yang mempunyai rumus kimia SiO2N h2o, kekerasan 5,5-6,5 berat jenis 3,5-4,2, warna merah, coklat, kuning, putih hijau, hitam

Cari Istilah Geologi Tambang


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