Granite can be used to make polished granite and also used for decoration.
To make Granite, you need to enter into Nether to get Nether Quartz then have to get Cobblestones to craft Diorite using Crafting Table. Please follow the following steps to make Granite.
In order to make Granite, the basic item that you need to find and get is Nether Quartz. Enter in Nether and use your pickaxe to get at least three nether quartz.
After that, you will have to find at least two cobblestone blocks. Use your iron pickaxe to get these blocks.
Now you need to use the crafting table to craft a diorite block. Go towards the crafting table and open up 3*3 crafting grid to add two cobblestones and two nether quartz in the grid by following the exact pattern shown below. You will get two diorite blocks in the right-side box of the crafting table. Add these diorite blocks in your inventory.
Now you can make a Granite using the crafting table once more. Open up 3*3 crafting grid to add diorite and nether quartz in adjacent cells of any row or column. You will get Granite in the right-side box of the crafting table. Add this item in your “ready to use” stock.