Gemma

• Adafruit Industries
• Alpha Coronae Borealis
• Diacamma
• Gas phase electrophoretic molecular mobility analysis
• Gemma (botany)
• Gemma (given name)
• Gemma (language model)
• Gemma (organisation)
• Gemma (surname)
• Gemma gemma
• Italian submarine Gemma
• Jemma (disambiguation)
• MV Gemma
• SS Gemma
• Veneridae
• Walter Gemma