Geode
Rock Crystal - novella - was created in 1853.
Please further define what you mean by 'crystal rock'.
How shiny a rock or crystal is.
No Schist is not a crystal, but it is composed of minerals.
Quartz.
yes
Rock gypsum.
mineral
No. While you don't happen upon it easily outside of stores/unpolished, rock crystal is widely available.
No. A crystal is the solid form of a mineral. Mineral crystals are present in nearly every rock, regardless of type.
the different types of crystal are sugar salt and rock.
the Florida state rock is agatized coral.