| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 1994 | 978-0-9641733-0-9 | Gary A Roskin | Photo Masters for Diamond Grading |
| 1995 | 978-0-9641733-1-6 | Alan Hodgkinson | Visual Optics - Gem Identification Without Instruments |
| 1996 | 978-0-9641733-2-3 | Anthony De Goutiere | Wonders Within Gemstones: The Elusive Beauty of Gemstone Inclusions |