Templat:Infobox mineral/doc
Penggunaan
Batu delima | |
---|---|
Umum | |
Kategori | Variasi mineral |
Rumus (unit berulang) | aluminium oksida dengan kromium, Al2O3:Cr |
Sistem kristal | Kelompok Ruang Simbol (-3 2/m) Trigonal (Heksagonal Skalenohedral): R-3c |
Identifikasi | |
Warna | Merah, bisa kecoklatan, keunguan atau kemerahjambuan |
Perawakan | Bervariasi tergantung daerahnya. Prisma heksagonal bertabel buntu. |
Belahan | Tidak ada bersihan asli |
Fraktur | Tidak genap atau konkoidal |
Kekerasan dalam skala Mohs | 9.0 |
Kilau | Kekacaan |
Gores | putih |
Diafaneitas | transparan |
Berat jenis | 4.0 |
Indeks bias | nω=1.768 - 1.772 nε=1.760 - 1.763, Bias ganda 0.008 |
Pleokroisme | Merah kejinggaan, merah keunguan |
Fluoresensi ultraungu | 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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