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apatite will not scratch quartz topaz calcite or corundum
Using the Mohs Mineral Hardness scale, calcite has a hardness of 3. Hence anything with a hardness of 3 or above can scratch calcite (i.e...quartz and fluorite).
No.because calcite is softer then feldspar
Somewhere between 3 and 5 on the Mohs scale of relative mineral hardness...
Mohs scale is a relative scale that defines the hardness of a mineral as its ability to produce a scratch on the surface of a reference mineral. The number for hardness assigned to the tested mineral is the number given to the hardest material that the mineral can scratch. The reference materials are 1) Talc 2) Gypsum 3) Calcite 4) Fluorite 5) Apatite 6) Orthoclase 7) Quartz 8) Topaz 9) Korundum 10) Diamond These materials can be tested more quantitatively for their hardness by standardized tests on how resistent they are against scratching. The mohs scale is thus more of a handy tool when one is out in the countryside and wants to have a rapid test if one found a quartz or a calcite.
On the Mohs mineral hardness scale, calcite is about a 3, and apatite is about a 5. So, whatever is at a hardness of 4 will scratch a 3 but not a 5. That mineral is fluorite.
Yes.Apatite - Ca5(PO4)3OH - has a Mohs hardness of 5.Calcite - CaCO3 - has a Mohs hardness of 5.
apatite will not scratch quartz topaz calcite or corundum
Using the Mohs Mineral Hardness scale, calcite has a hardness of 3. Hence anything with a hardness of 3 or above can scratch calcite (i.e...quartz and fluorite).
Minerals that will scratch apatite must be more than a 5 on the Moh's hardness scale. So feldspar, quartz, topaz, corundum, and diamond will scratch apatite.
True
Any mineral with a Mohs hardness of 3 or above. Diamond, for instance.
Quartz, with a hardness of 7, will scratch calcite, with a hardness of 3.
No.because calcite is softer then feldspar
You can tell what Topaz can scratch by looking at the Moh's Scale of Hardness. It looks at ten well known, easily available minerals, and arranged them in order of their "scratch hardness". If a specimen to be tested can be scratched by a known mineral from the list, it is softer than that mineral. If it in turn will scratch another known mineral, it is harder than that mineral. Topaz is ranked an 8 and therefore can scratch everything lower than an 8. This includes quartz, feldspar, apatite, calcite, gypsum and talc.
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It is hardness. Calcite is harder than gypsum.