A microcrystalline type of quartz occurring in several different forms, including onyx, agate, and jasper
Chalcogenide
How to Pronounce Chalcogenide
Chalcogens
How to Pronounce Chalcogens
Chalcolithic
How to Pronounce Chalcolithic
Chalcopyrite
How to Pronounce Chalcopyrite
Chaldeans
How to Pronounce Chaldeans
