Talc
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Talc is one of the softest known minerals, ranking as a 1 on the Mohs hardness scale. It is commonly used in powders and cosmetics.
Talc has a hardness of 1 on the Mohs scale, making it one of the softest minerals.
According to the Mohs scale - the softest mineral (with a value of 1) is talc.
The scratch table is called the Mohs Scale of Mineral Hardness and measures the hardness of minerals in relation to the known hardest (diamond) and softest (talc) minerals.
The order of hardness from softest to hardest for the mentioned minerals is as follows: cinnabar, emerald, augite, sapphire, magnetite.
Mohs Hardness Scale is a scale that measures the hardness of minerals on a scale of 1 to 10, with 1 being the softest and 10 being the hardest. The scale is based on the ability of one mineral to scratch another, with a higher number indicating that the mineral can scratch those with a lower number.