| Name: | Corundum Crn |
| Specimens in Collection: |  #497: Corundum var. Ruby Guinea  #500: Corundum var. Sapphire Kitui, Kenya  #126: Corundum var. Ruby Kitato District, Manyara Region, Tanzania  #30: Corundum var. Sapphire Badakhshan, Afghanistan  #125: Corundum var. Ruby India  #431: Corundum var. Ruby Morogoro Region, Tanzania  #496: Corundum var. Ruby Guinea  #354: Corundum var. Sapphire Montana, USA  #127: Corundum var. Sapphire  #710: Corundum var. Ruby Mysore Corundum Deposits, Karnataka, India  #848: Corundum var. Sapphire Sri Lanka  #1238: Corundum var. Sapphire / Biotite Ihosy Dist., Ihorambe, Madagascar  #1537: Corundum var. Sapphire Tanzania |
| IMA Chemistry: | Al2O3 |
| Chemistry Elements: | The mineral Corundum contains elements: Aluminum (Al) Oxygen (O) |
| Country of Type Locality: | India ? |
| Year First Published: | 0 |
| IMA Status: | Approved,Grandfathered |
| Status Notes: | Mineral name has been known since antiquity and predates any formal descriptive publication. |
| Structural Group Name: | Corundum |
| Fleischer's Group Name: | hematite |
| Crystal Systems: | hexagonal |
| Oldest Known Age: | 4700 Million Years Ago |
| Mohs Hardness: | 9.0 |
| Diaphaneity: | 1.0 |
| Specific Gravity: | 4.025 |
| Dispersion: | 0.018000000000000002 |
| More Info: | Search Wikipedia: Corundum (Wiki) Search Mindat: Corundum Search Web Mineral DB: Corundum |