Diamond is harder than onyx.
Quartz is usually a little more expensive than granite. Quartz is harder than granite and less likely to ship or stain, though I have had granite for over a year now in my kitchen and love it!
Yes
Yes
Diamonds aren't always sharper, but they can be manufactured in such a way. Diamonds are harder than steel.
Diamond is harder than onyx.
Onyx has a hardness of about 6.5-7 on the Mohs scale, making it relatively durable and suitable for use in jewelry and carvings. It is slightly softer than quartz and can be scratched by harder materials.
Why is quartz harder steel
Yes an emerald or green beryl is harder than quartz
If you mean isn't harder than quartz but harder than apatite ( you spelled it wrong), that would be Orthoclase Feldspar. Else the minerals that are harder than both apatite and quartz are topaz, corundum, and diamond (diamond being the hardest, well the hardest non synthetic mineral).
kaolin
Based on Moh's Scale of Hardness that identifies minerals, it is. Moh's Scale of HardnessTalcGypsumCalciteFluoriteApatiteOrthoclaseQuartzTopazCorundumDiamondIn this scale, 10 minerals are used as reference. These minerals are arranged from the softest (1) to the hardest (10). thxs
Quartz because its harder than calcite and the quartz in thicker.
Onyx is silicon dioxide with some impurities.
Answeronyx is a mineral marble is a rock. Onyx is more harder and good for making handicraft products. Onyx shines more and looks more beautiful then marble. You can view marble and onyx products at the related link below
Mohs measures relative hardness (quartz is harder than orthoclase; topaz is harder than quartz), but it doesn't accurately tell HOW MUCH harder something is than something else. There is another scale, called the Rockwell, which does this.
Onyx is a variety of quartz, usually with a sedimentary origin.