Marble countertops have different hardness for mohs. Most common is around 4, that is why we took that as the base. Some Brazilian marble would be close to 5 in hardness. Granite is one of the hardest natural stone materials. Granite hardness would be 6 and over. It would not be possible to scratch granite countertops using a knife.

3: A type of mineral that forms rocks, calcite is number three on the Mohs scale. According to that scale, calcite has the same hardness as a 

The hardness of a mineral relates to its resistance from abrasion, and is defined in terms of Mohs hardness scale. This scale designates a value ranging from 1 to 10 (with .5 increments) for each

Hardness Scale And Durability: Granite is scored at a 7 on the Mohs scale of hardness, and won't scratch and etch through everyday use. It is 

6/25 · While talc is ranked with a Mohs hardness of “1,” the hardest substance—you guessed it, the diamond—comes in at a “10.” As awesome as it would be to have a diamond-studded countertop, here’s why this information is important when it comes to choosing the strongest material for this particular surface: Granite, which is a composite of feldspar and

The Mohs scale is used to measure the hardness of stone. The scale ranks minerals from 1 to 10, 1 being the softest and 10 being the hardest.

Countertop stones are ranked for hardness on the Mohs scale as below: Soapstone - 1. Marble - 3-5. Limestone - 3-5. Sandstone - 6-7. Granite - 6-8. Quartz - 7-8. Harder countertops will be more durable, so if you want durability choose a granite or quartz slab for your kitchen or bathroom countertop. Here at Kol Marble and Granite

In terms of hardness, quartz narrowly wins with a Mohs hardness scale rating of 7, while granite typically sits at a 6. There are granite slabs that exist with a 7, however, in terms of their average hardness, quartz wins. While numerically one stone wins, there is actually not much of a difference in terms of durability between a 6 or a 7.

A mineral of unknown hardness can be tested against one of the standard minerals listed below. Whichever one scratches the other is harder and if both scratch each other they are both the same hardness. Granite is rated 6 on the Mohs scale. Engineered Stone 1.

Because granite varies in the porosity and composition, the hardness is a range; usually from 6 to 7. Quartz, 7, Quartz is an engineered material using polymer 

Thermal conductivity of Granite is 3.2 W/ (m·K). The heat transfer characteristics of a solid material are measured by a property called the thermal conductivity, k (or λ), measured in W/m.K. It is a measure of a substance’s ability to transfer heat through a material by conduction. Note that Fourier’s law applies for all matter