sapphire
Saphires are all corundums that are not red. If only sapphire is spoken, the blue sapphire is clearly meant. It is therefore necessary, in the case of the differently coloured sapphires, to add the respective colour, for example. Green sapphire. Their hardness is similar to the rubies very high.
SAPPHIRE
Color: blue, colorless, pink, orange, yellow, green, violet
Mohs hardness: 9
SAPPHIRE
Color: blue, colorless, pink, orange, yellow, green, violet
Mohs hardness: 9