"Contraluz" opal, Nevada (3.19). Photo © Joel E. Arem, PhD, FGA. Used with permission.
Colorless Play-of-Color Opal Stone, 3.19 ct Faceted Baguette Cut from United States
"Contraluz" opal, Nevada (3.19). Photo © Joel E. Arem, PhD, FGA. Used with permission.
Article: Appraising Opals
Credit: Joel E. Arem, PhD, FGA
| Gemstone | Opal Stone |
| Natural or man made | Natural |
| Origin | United States |
| Origin details | Nevada |
| Carat Weight | 3.19 |
| Gem State | Faceted |
| Color | Colorless |
| Transparency | Transparent |
| Photo phenomena | Play of Color |