The diamond is the hardest mineral on the Mohs scale, rated 10. In contrast, talc is the finest material, ranking one. Following diamonds closely on the Mohs scale are corundum (9), titanium (9) and topaz (8).
Corundum (such as ruby and sapphire) are the hardest stones, scoring an eight on the Mohs scale and being regarded as 'outstanding' in terms of durability. Sapphire, ruby, and diamond are excellent options for commonplace jewellery, such as engagement rings.
Granite. Granite is one of the most commonly used structural stones, surpassing marble. Marble is a metamorphic rock formed when limestone is subjected to intense heat and pressure.
Granite is an ideal material and one of the most vital stones for buildings, exterior wall cladding, paving, monuments, and other exterior and interior applications. On the Mohs scale, limestone falls between three and four, indicating that it is typically a malleable stone.