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

Derived forms: ruby spinels

Type of: spinel

• betting shop
• bettong
• Bettongia
• bettor
• betty
• Betty Friedan
• Betty Naomi Friedan
• Betty Naomi Goldstein Friedan
• Betula
• Betula alleghaniensis
• Betula cordifolia
• Betula fontinalis
• Betula glandulosa
• Betula lenta
• Betula leutea
• Betula neoalaskana
• Betula nigra
• Betula papyrifera
• Betula pendula
• Betula populifolia
• Betula pubescens
• Betulaceae
• betulaceous
• between
• between decks