meaning of opal
1. A mineral consisting, like quartz, of silica, but inferior to quartz in hardness and specific gravity.
2. a translucent mineral consisting of hydrated silica of variable color; some varieties are used as gemstones
Related Words
opal | opal glass | opalesce | opalesced | opalescence | opalescent | opalescing | opaline | opalise | opalize | opalized | opalizing | opalotype |
