Chalcedony vs. Chert
Difference Between Chalcedony and Chert
A form of fine-grained quartz that is nearly transparent or has a milky translucence; it fractures conchoidally.
Massive, usually dull-colored and opaque, quartzite, hornstone, impure chalcedony, or other flint-like mineral.
a milky or grayish translucent to transparent quartz
(countable) A flint-like tool made from chert.
variety of silica containing microcrystalline quartz