Andesite is a block that is used for the decoration of buildings. To make Andesite you will need just two things, Cobble stone and Diorite. Please follow the following steps to make an Andesite.
In order to make andesite, the basic item you will need is cobblestone. You will have to find and get at least 1 cobblestone block.
The next thing you need is diorite. You will have to find at least 1 diorite block. Use your stone pickaxe to get it.
Make your way towards the crafting table to craft andesite. Open up the 3*3 crafting grid and add diorite and cobblestone blocks in adjacent cells You will get 2 Andesite blocks, bring them into your inventory.