
Why is marble harder than limestone ? The mineral grains in marble are formed from the recrystallization of calcite that was present in limestone or dolostone. It has been in use extensively since the ancient times for both indoor and outdoor applications. It is mostly known as the most durable natural stone and compared to marble. Because of what the two are made up of. This means that granite is slightly harder than marble , but both offer reasonably good durability.
Quartz is often the most affordable option. But it doesn’t have the same high-en natural look that marble and granite do. Flint is silica (quartz) with a Mohs hardness of 7. It’s also more durable than marble.
OVERALL, granite is ‘softer’ than flint - and you can use a flint knife to carve granite. This is why marble is the favored sculpting stone. She says it’s harder than Carrera marble but softer than granite , and it will etch.
Any ideas what exactly I am buying? We just had sandulus quartzite installed and it is stunning. I will immediately admit that it is not harder than granite. However it has a different advantage.
Some of thsee decompose when exposed to water and air. Granite crumbles away, given time. If the question is whether granite is harder than diamon the answer is no. The hardness scale for minerals is called the Mohs scale.



