Agate is a variety of silicon dioxide (SiO2); it is not a silicate.
Quartz agate would scratch glass. Glass would not scratch quartz agate.
Agate.
Agate is colloidal silica - it is a form of quartz.
The answr is agate
Agate is a form of quartz, with a formula of SiO2.
The meaning of the word agate is an ornamental stone consisting of a hard variety of chalcedony, typically banded in appearance. Or a colored toy marble resembling a banded gemstone.
Agate :D
Agate, being a cryptocrystalline (microscopic crystal structure) form of quartz, does not have a crystal shape.
Agate,highly tinted quartz,and slate.
see if it has any solid quartz in it . Quartz makes it worth nothing.
An aggat is an obsolete form of agate, an uncrystallized variety of quartz.