Koivula, John
from the Antique Jewelry University
| Country of origin: | USA |
|---|---|
| Books by this author: | Photoatlas of Inclusions in Gemstones vol. 1, Photoatlas of Inclusions in Gemstones vol. 3, and Photoatlas of Inclusions in Gemstones vol. 2 |
| Country of origin: | USA |
|---|---|
| Books by this author: | Photoatlas of Inclusions in Gemstones vol. 1, Photoatlas of Inclusions in Gemstones vol. 3, and Photoatlas of Inclusions in Gemstones vol. 2 |