the condition that will produce rocks with crystals is due to Slow cooling
The small crystals are formed outside the volcano by the cold air... the cold air cools down the igneous rock and the crystals don't have time to join together so the are small. And the big crystals are formed inside the volcano very slowly and that way they have time to join together then there are big crystals that have been formed. AND F*** HER IN THE P**** HARD
No
Grainy rocks not only absorbs water better than crystal rocks, but it filters the water as well.
We don't "produce" rocks.
Such rocks are porphyritic.
Porphyritic Rocks are rocks that have big and small crystal's like the Igneous Rock "Andesite".
crystal rocks, I guess.
Crystal
Yes, rocks can contain a variety of crystal sizes.
Diamond.A diamond is a crystal, and a crystal is a rock with neatly arranged atoms.
Gemstones are made of Crystal rocks
Crystal size in igneous rocks is controlled by the rate of cooling whereby the slower the rate, the larger the size of crystal.
I like crystal rocks. You see plain rocks everywhere, but crystals and gems are one of a kind