Lapidary Journal 2006 John I Koivula - Abstracts
| Lapidary Journal 2006 John I Koivula | |||||
| Title | Subject | Authors | |||
|---|---|---|---|---|---|
| Aventurescent "Star" Obsidian. | Hobbies and crafts | John I. Koivula, John S. White | |||
| Exploring agates. | Hobbies and crafts | John I. Koivula, John S. White | |||
| Hematite "Nails" in quartz from China. | Hobbies and crafts | John I. Koivula, John S. White | |||
| Inside gems: Precious Conk opal. | Hobbies and crafts | John I. Koivula, John S. White | |||
| Turquoise in gypsum from New Mexico. | Hobbies and crafts | John I. Koivula, John S. White | |||
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