How to distinguish granite from Shi Ying in the material of cabinet countertops?

Quartz stone is made of 94% timely and 6% resin, and its hardness reaches 7 degrees. Shi Gang is made of resin and marble powder, so the hardness is generally 4-6 degrees. Generally speaking, the hardness of quartz stone is higher than that of Shi Gang, and it is scratch-resistant and wear-resistant. Quartz stone can be reused, because the material distribution of quartz stone is uniform, that is to say, after the surface is damaged by collision, the front and back sides can achieve the same effect through simple polishing, which greatly reduces the maintenance cost and expense. Shi Gang can't be reused, because its front is specially made, and once it is damaged, it can't be used again.