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

Derived forms: ruby spinels

Type of: spinel

• erethism
• Erethizon
• Erethizon dorsatum
• Erethizontidae
• Eretmochelys
• Eretmochelys imbricata
• Erewhon
• erg
• ergo
• ergocalciferol
• ergodic
• ergodicity
• ergometer
• ergonomic
• ergonomically
• ergonomics
• ergonovine
• ergosterol
• ergot
• ergotamine
• ergotic
• ergotism
• Ergotrate Maleate
• ergotropic
• ergotropism