Templat:Infobox mineral
| {{PAGENAME}} | |
|---|---|
| Umum |
Penggunaan
[sunting sumber]| Batu delima | |
|---|---|
 Kristal batu delima alami | |
| 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 |
| Massa jenis | 4'000 Kg/m3 |
| 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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