Purple Crystal Opal, 3.35ct from Lighting Ridge, Australia Size_Huge (5.0 - 9.99ct) and some blue and green

and some blue and green showing up

large potch areas

Australian Boulder opals from Koroit opal fields can show the most interesting patterns of precious opal in the ironstone matrix

Black opal

Brightness: 4

Purple Crystal Opal, 3.35ct from Lighting Ridge, Australia Size_Huge (5.0 - 9.99ct) and some blue and green3. 35ct, 14. 44x8. 70x4. 02mm from Lightning Ridge, Australia. Brightness: 2 of 5, moderate; Body tone: Black crystal opal with potch webbing. This free form Australian mixed body opal has beautiful pattern, what looks like a night sky with bright flashes and pinfire pattern around it. A great opal to be set in a pendant or ring. *This opal is cut and polished by Lga from Ligas Creative Workshop.