It's an igneous porphyry.
porphyry
Such rocks are called porphyritic.
diorite crystals are large and andesite crystals are small
It depends on the type of igneous rock. Intrusive igneous rocks such as granite have large crystals, extrusive igneous rocks may have small crystals as in basalt or no crystals as in pumice.
No. Basalt generally has small crystals.
porphyry
Such rocks are called porphyritic.
Ah, a classic. It is porphyritic. The classic example is granite.
diorite crystals are large and andesite crystals are small
Small crystals. :D
A small one is called an island and a large one is called a continent.
It depends on the type of igneous rock. Intrusive igneous rocks such as granite have large crystals, extrusive igneous rocks may have small crystals as in basalt or no crystals as in pumice.
No. Basalt generally has small crystals.
Pumice does not have crystals. It is made of glass.
Large grains, and crystals
It is called an island.
small, rapid colling