| Name: | Dumortierite Dum |
| Specimens in Collection: |  #672: Quartz / Dumortierite China  #1152: Quartz/Dumortierite (Rough) Brazil  #138: Dumortierite Vaca Morte Quarry, Bahia, Brazil |
| IMA Chemistry: | AlAl6BSi3O18 |
| Chemistry Elements: | The mineral Dumortierite contains elements: Aluminum (Al) Boron (B) Silicon (Si) Oxygen (O) |
| Country of Type Locality: | France |
| Year First Published: | 1881 |
| IMA Status: | Approved,Redefined |
| Status Notes: | Gonnard F (1881) Note sur l´existance d´une espèce minérale nouvelle, la dumortiérite dans le gneiss de Beaunan, au-dessus des anciens aqueducs galloromains de la vallée de l´Izeron (Rhône), Bulletin de la Société Minéralogique de France 4, 2-5 Chemical composition changed from (Al,[box])Al_6_BSi_3_O_16_(O,OH)_2_: Pieczka A, Evans R J, Grew E S, Groat L A, Ma C, Rossman G R (2013) The dumortierite supergroup. I. A new nomenclature for the dumortierite and holtite groups. Mineralogical Magazine 77, 2825-2839 |
| Structural Group Name: | Dumortierite |
| Fleischer's Group Name: | dumortierite |
| Crystal Systems: | orthorhombic |
| Oldest Known Age: | 2715 Million Years Ago |
| Mohs Hardness: | 7.75 |
| Diaphaneity: | 2.0 |
| Specific Gravity: | 3.35 |
| More Info: | Search Wikipedia: Dumortierite (Wiki) Search Mindat: Dumortierite Search Web Mineral DB: Dumortierite |