Talc is definitely the softest mineral known to man and, as a result, is ranked number 1 from the hardness scale. On another conclusion of your spectrum, diamonds are rated at 10. To be able to produce this exam, a hardness test can be ordered. Employing a flat, clean up https://fryd-liquid-diamond45420.topbloghub.com/29516377/fryd-liquid-diamond-things-to-know-before-you-buy