Grinding wheels with aluminum oxide ( corundum ), silicon carbide, or ceramic grains are called conventional abrasives.
32.
For softer materials silicon carbide, garnet ( emery ) or corundum can be used in place of the diamond.
33.
Aluminium oxide is very durable and extremely hard; it occurs naturally as corundum, and finds applications in sandpaper.
34.
It was a former mining town that produced corundum from deposits in Mount Robillard, directly north of the community.
35.
One of the safest methods of microdermabrasion involves the use of corundum or aluminum oxide crystals suspended in an antioxidant cream.
36.
Most gemstones described as synthetic alexandrite are actually simulated alexandrite-synthetic corundum laced with vanadium to produce the color change.
37.
The tools made with common abrasives ( e . g . corundum and silicon carbide ) can also do the task.
38.
In most cases, corundum or silicon carbide are acceptable, but extremely hard workpiece materials must be honed using superabrasives.
39.
For example, ruby is the red variety of the species corundum, while any other color of corundum is considered sapphire.
40.
For example, ruby is the red variety of the species corundum, while any other color of corundum is considered sapphire.
