Mineral containing magnesium

• Occurs in various colors that are used as gemstones
• Rubylike gemstone
• Gemstone mined in Sri Lanka
• Rubylike gem
• Ruby ___ (gem)
• A hard glassy mineral consisting of an oxide of magnesium and aluminum
• Reddish mineral
• Ruby 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

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Spinel \Spin"el\, n. Bleached yarn in making the linen tape called inkle; unwrought inkle. --Knight.