1) Beautiful stone 2) Cut mineral 3) Decorative stone 4) Gemstone mineral 5) Gemstone 6) Jewel mineral 7) Jewel 8) Mineral gemstone 9) Mineral jewel 10) Polished jewel 11) Polished mineral 12) Precious gem 13) Precious stone 14) Precious jewel 15) Prized mineral 16) Prized stone 17) Precious gemstone 
• (n.) A variety of tourmaline varying in color from a pale rose to a deep ruby, and containing lithium.
Ru'bel·lite noun [ Latin rubellus reddish, dim. of ruber red.] (Min.) A variety of tourmaline varying in color from a pale rose to a deep ruby, and containing lithium. 
a deep-red variety of tourmaline, used as a gem.