Gemstones / by Paul O'Neil and the editors of Time-Life Books.

Eitemau Tebyg

• Gemology
  gan: Hurlbut, Cornelius S. (Cornelius Searle), 1906-2005
  Cyhoeddwyd: (1991)
• A book of precious stones; the identification of gems and gem minerals, and an account of their scientific, commercial, artistic, and historical aspects,
  gan: Wodiska, Julius
  Cyhoeddwyd: (1909)
• Handbook and descriptive catalogue of the collections of gems and precious stones in the United States National museum,
  Cyhoeddwyd: (1922)
• Gemstone & crystal properties
  gan: Billock, Jennifer
  Cyhoeddwyd: (2015)
• Man-made gemstones
  gan: Elwell, Dennis
  Cyhoeddwyd: (1979)