1. A spinel used as a gemstone (usually dark red)
   - ruby spinel

Type of: spinel

Encyclopedia: Spinel ruby

• solitudinarian
• solleret
• solmisation
• solmizate
• solmization
• solo
• solo blast
• solo homer
• Solo man
• soloist
• Solomon
• Solomon Bellow
• Solomon Guggenheim
• Solomon Hurok
• Solomon Islands
• Solomon's-seal
• Solomonic
• Solomons
• solon
• Solresol
• solstice
• solstitial
• solubility
• soluble
• soluble glass