Topaz can be found in New Hampshire, Colorado, Utah, California and Mexico
Mexico and Utah
Worcester Park, England, the United Kingdom, London, Surrey, Sutton, England, Great Britain and Shropshire
Diatomite has a hardness of around 5.5 on the Mohs scale of hardness.
It's called the Ore
Azurite has a hardness of 3.5 to 4 on the Mohs hardness scale.
flint is a type of quartz, so it has a hardness of about 7 on the mohs scale of hardness
Dolomite has a hardness of 3.5-4 on the Mohs scale of hardness.
Amethyst, a variety of quartz, has a hardness rating of 7 on Mohs scale.
The Density of an Amethyst Rock is 2.65 according to many sites.
Diatomite has a hardness of around 5.5 on the Mohs scale of hardness.
It's called the Ore
The hardness of Limonite is 4 t0 5.5 on the mohs hardness scale.
Azurite has a hardness of 3.5 to 4 on the Mohs hardness scale.
flint is a type of quartz, so it has a hardness of about 7 on the mohs scale of hardness
Amethyst is a type of quartz, making it a 7.
The hardness is 3-4 on Mohs scale.
Nickel has a hardness of 4 on the Mohs scale.
Dolomite has a hardness of 3.5-4 on the Mohs scale of hardness.
The Mohs scale is used to determine the relative hardness of minerals.