Gemstone mined in Sri Lanka

• Ornamental stone
• Rubylike gemstone
• Mineral used as a gem
• Occurs in various colors that are used as gemstones
• Reddish mineral
• Gemstone often passed off as a ruby
• Ruby variety

Wikipedia Word definitions in Wikipedia
Spinel is the magnesium aluminium member of the larger spinel group of minerals. It has the formula MgAlO in the cubic crystal system . Its name comes from Latin "spina" (arrow). Balas ruby is an old name for a rose-tinted variety.

WordNet Word definitions in WordNet
n. a hard glassy mineral consisting of an oxide of magnesium and aluminum; occurs in various colors that are used as gemstones