Andesite

Andesite is Found in the overworld

Natural Generation
One block of polished andesite can be found in igloo basements. Polished andesite can also be found in the "nature", "forge", and "large jail" rooms of woodland mansions. Andesite can also generate in snowy tundra village blacksmiths & armorer houses.

Andesite generates naturally in coral reefs, replacing some coral as part of coral crusts.‌[Bedrock Edition only]

Andesite can generate in the Overworld in the form of mineral veins. Andesite attempts to generate 10 times per chunk in veins of size 1-33, from levels 0 to 79, in all biomes.

Breaking
Andesite can be mined using any type pickaxe. If mined without a pickaxe, it drops nothing.

Usage
Andesite is currently used only for decoration. It has the same blast resistance as stone, meaning it can be used as a substitute for stone when building.

Trivia

 * meaning that it is formed from magma (thus igneous) that had flowed out to the surface (thus extrusive) as lava and cooled down.
 * Andesite's intrusive counterpart is diorite, meaning that diorite and andesite are made of the same materials but diorite formed inside the Earth instead of flowing out.
 * In other words, andesite is a rock formed from cooled lava, and diorite is a rock formed from cooled magma.