Geodes are rocks that are lined or filled with crystals. Pegmatites are rock formations that often exhibit extremely large crystals. Just a note--all rocks are composed of mineral crystals, with few exceptions. The crystals in some, however are just too small to see.
A porphyritic texture.
crystallographer
cirrostatus
It's the sedimentary rock shale.
Rapid cooling of lava in which tiny crystals form results in a glassy texture.
No. A geode is not a shape; it is a kind of rock with a hollow interior filled with crystals. Earth's shape is an oblate spheroid.
The good kind. The more crystals, the better. The crystals are what get you high I believe
No beef makes crystals.
A quartzite.
Ice
A porphyritic texture.
ionic solids
Coarse large grained crystals.
The right bonds
Yes.
hygroscopic
A phaneritic texture.