Diamond is a very hard white mineral.
Very soft mineral
garnets
it is determined when you rub the mineral on a hard, rough, white surface.
A streak is the color of the powdered mineral left behind when the mineral is rubbed against a hard, rough surface. Limestone typically has a white streak due to its composition of calcium carbonate.
a domino
The streak of Jade is white.
It's a quarts. This isn't much info but maybe this will help
Corundum is a very hard mineral used as an abrasive in industry.
Yes, hard water can leave a white residue on surfaces due to the high mineral content, such as calcium and magnesium, that can be deposited when the water evaporates.
A six-sided mineral crystal that is very hard is typically referred to as a hexagonal crystal. One common example of a hard mineral with this crystal structure is quartz, which has a hardness of 7 on the Mohs scale. Another example is beryl, which includes varieties like emerald and aquamarine. These minerals are characterized by their distinct six-sided (hexagonal) symmetry and exceptional durability.
A six-sided mineral crystal may be a naturally occurring form of quartz, which is a very hard mineral. Quartz is widely known for its six-sided crystal structure and its hardness, which ranks 7 on the Mohs scale of hardness. It is commonly used in jewelry and as a component in various industrial applications.
Hardness, which is measured by the Mohs Scale, which goes from 1, very soft, like talc, to 10, very hard, like diamond.