Can anyone tell me exactly what "Emery" really is and wherabouts it fits on the Mohs scale of hardness?:confused:
![]() |
Can anyone tell me exactly what "Emery" really is and wherabouts it fits on the Mohs scale of hardness?:confused:
Emery is a very hard rock type used to make abrasive powder. It largely consists of the mineral corundum (aluminum oxide), mixed with other species such as the iron-bearing spinels hercynite and magnetite, and also rutile (titania). Industrial emery may contain a variety of other minerals and synthetic compounds such as magnesia, mullite, and silica.
Because it can be a mix of minerals, no definite Mohs hardness can be assigned: the hardness of corundum is 9 and that of some spinel-group minerals is near 8, but the hardness of others such as magnetite is near 6.
Emery (mineral) - Wikipedia, the free encyclopedia
All times are GMT -7. The time now is 01:06 AM. |