Aquamarine is between 7(Quartz) and 8(Topaz) on MOHs scale of hardness. But, Aquamarine is closer to 8(Topaz) than 7(Quartz). :-)
The hardness of Turqoise is a 5-6 on the Mohs hardness scale.
Topaz comes next, then corundum, then diamond is hardest with a hardness of 10
The September birthstone is sapphire, and it has a hardness of 9 on the Mohs scale. This makes it a durable and suitable gemstone for everyday wear in jewelry.
The Density of an Amethyst Rock is 2.65 according to many sites.
The hardness of Limonite is 4 t0 5.5 on the mohs hardness scale.
The hardness of Turqoise is a 5-6 on the Mohs hardness scale.
Topaz comes next, then corundum, then diamond is hardest with a hardness of 10
The September birthstone is sapphire, and it has a hardness of 9 on the Mohs scale. This makes it a durable and suitable gemstone for everyday wear in jewelry.
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.
June's birthstone is Pearl On the MOHS 1-10 Hardness scale 10 being Diamond the hardest stone" Pearl has a hardness of 3-4 Now June's Secondary birthstone is Alexandrite has a hardness of 8.5 by Micah5five -----------------------------------------------------------------------------------------
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
Nickel has a hardness of 4 on the Mohs scale.
The hardness is 3-4 on Mohs scale.