A standard scale was developed by Friedrich Mohs in 1812 The standard minerals making up the Mohs scale of hardness are: Talc Gypsum Calcite Fluorite Apatite Orthoclase Quartz Topaz Corundum Diamond This scale is approximately linear up to corundum, but diamond is approximately 5 times harder than corundum.
(A standard scale; was developed; by Friedrich Mohs; T:in 1812) (The standard minerals; making up; the Mohs scale of hardness) (diamond; is; approximately 5 times harder than corundum) (The standard minerals making up the Mohs scale of hardness; are; ) Context(The standard minerals making up the Mohs scale of hardness are,List([57, 119))):(This scale; is; approximately linear up to corundum)
The standard minerals making up the Mohs scale of hardness are,List([57, 119))
A standard scale The standard minerals diamond The standard minerals making up the Mohs scale of hardness This scale
was developed making up is are is
by Friedrich Mohs T:in 1812
the Mohs scale of hardness
approximately 5 times harder than corundum
approximately linear up to corundum