| The book reflects the author's many years of work in microscopy and photomicrography in the field of gemology. |
| Diffusing anything new into a stone during heating is almost always controversial in gemology. |
| Anyway you aren't trying to get a qualification in gemology, so it won't take you years or months to learn something about diamonds. |
| The extensive exhibition incorporates biology, gemology, anthropology, mineralogy, and ecology. |
| Following the war, Sinkankas renewed his interest in mineralogy and gemology. |
| She comes from a family of jewellers and she has herself done a course in gemology. |
