The sapphire was ranked a 9.0 on the moh's scale
This scale was proposed by the Austrian geologist Friderich Mohs.
It's called the Ore
Diatomite has a hardness of around 5.5 on the Mohs scale of hardness.
Azurite has a hardness of 3.5 to 4 on the Mohs hardness scale.
Arkose has a hardness of around 6 on the Mohs scale.
1 to 10. but above 5 to 8 is amazing stone.
You can see in the link, below, that a diamond is ranked as 10 on the Mohs scale of hardness, while a sapphire is ranked as 9. The Mohs scale ranks the hardness of minerals.The Mohs scale is an ordinal scale, meaning -- from Wikipedia:"Rank-ordering data simply puts the data on an ordinal scale. Ordinal measurements describe order, but not relative size or degree of difference between the items measured. "
Sapphire is a very strong and durable gemstone, second only to diamond on the Mohs scale of hardness. This makes it suitable for everyday wear, such as in engagement rings. Its durability and scratch-resistance make it a popular choice for jewelry.
This scale was proposed by the Austrian geologist Friderich Mohs.
On the Mohs scale of mineral hardness, corundum is listed as a 9, below diamond which has a rating of 10.
It's called the Ore
Diatomite has a hardness of around 5.5 on the Mohs scale of hardness.
The Mohs scale is used to measure the hardness of a mineral by its resistance to scratching. From softest to hardest, for example, the ten minerals of the Mohs scale are talc (measuring 1 on the scale), gypsum, calcite, fluorite, apatite, orthoclase, quartz, topaz, corundum, and diamond (measuring 10 on the scale). A sapphire is a 9.0.
The hardness is 3-4 on Mohs scale.
Nickel has a hardness of 4 on the Mohs scale.
Topaz is number 8 on the Mohs scale.
The Mohs scale compares the hardness of an object or substance.