Koivula, John
| Country of origin: | USA |
|---|---|
| Books by this author: | Photoatlas of Inclusions in Gemstones vol. 1, Photoatlas of Inclusions in Gemstones vol. 2, and Photoatlas of Inclusions in Gemstones vol. 3 |
Personal tools
| Country of origin: | USA |
|---|---|
| Books by this author: | Photoatlas of Inclusions in Gemstones vol. 1, Photoatlas of Inclusions in Gemstones vol. 2, and Photoatlas of Inclusions in Gemstones vol. 3 |