according to the mohs hardness scale, the hardness of quartz is 1. 5 - 2.
according to the mohs hardness scale what is the hardness of quartz?
1. 5 - 2
myrickite is a name used for both the agatized and opalized cinnabar materials. with a mohs hardness of 7, the agatized form is a red-orange with bits of white, whereas the opalized material is orange and black and is 5 on the mohs hardness scale. although similar in color, this material should not be confused with the stone from china referred to as "chicken blood", as that material is a cinnabar stained serpentine with a hardness of 2.5-4. unique to the united states, myrickite is found at only one location in any quantity. during the early 1950s, myrickite had been found in small quantities at the manhattan mine, located in napa county, california, usa.
myrickite
section::::usage.





























despite its lack of precision, the mohs scale is relevant for field geologists, who use the scale to roughly identify minerals using scratch kits. the mohs scale hardness of minerals can be commonly found in reference sheets. 





























mohs hardness is useful in milling. it allows assessment of which kind of mill will best reduce a given product whose hardness is known. the scale is used at electronic manufacturers for testing the resilience of flat panel display components (such as cover glass for lcds or encapsulation for oleds).





























section::::minerals.
mohs scale of mineral hardness