Templat:Infobox mineral
Penggunaan
Batu delima | |
---|---|
![]() Kristal batu delima alami | |
Umum | |
Kategori | Variasi mineral |
Rumus kimia | aluminium oksida dengan kromium, Al2O3:Cr |
Identifikasi | |
Warna | Merah, bisa kecoklatan, keunguan atau kemerahjambuan |
Perawakan | Bervariasi tergantung daerahnya. Prisma heksagonal bertabel buntu. |
Sistem kristal | Kelompok Ruang Simbol (-3 2/m) Trigonal (Heksagonal Skalenohedral): R-3c |
Belahan | Tidak ada bersihan asli |
Pecahan | Tidak genap atau konkoidal |
Skala kekerasan Mohs | 9.0 |
Kilap | Kekacaan |
Gores | putih |
Diafaneitas | transparan |
Kepadatan | 4'000 Kg/m3 |
Indeks pembiasan | nω=1.768 - 1.772 nε=1.760 - 1.763, Bias ganda 0.008 |
Pleokroisme | Merah kejinggaan, merah keunguan |
Fluoresens ultraviolet | merah di bawah gelombang panjang |
Titik lebur | 2044 °C |
Kelarutan | tidak ada |
Variasi utama | |
Safir | Semua warna kecuali merah |
Korundum | berbagai warna |
Emeri | Granuler |
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