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nounthe chief source of beryllium; colored transparent varieties are valued as gemstype of:
Definition that contains beryl
- emerald a green transparent form of beryl; highly valued as a gemstone
- aquamarine a transparent variety of beryl that is blue green in color
- beryl the chief source of beryllium; colored transparent varieties are valued as gems
- alkaline-earth metal any of the bivalent metals of group II of the periodic table (calcium or strontium or barium or magnesium or beryllium)
- gadolinite a mineral that is a source of rare earths; consists of silicates of iron and beryllium and cerium and yttrium and erbium
- beryllium bronze a copper-base alloy containing beryllium
- plutonium trigger a steel or beryllium sphere containing plutonium 239 that triggers nuclear fission when compressed by explosives
- morganite a kind of pink beryl used as a gemstone
- alexandrite a green variety of chrysoberyl used as a gemstone
- cat's eye any of various gems (as chrysoberyl or chalcedony) that reflect light when cut in a rounded shape