4.37ct Koroit Boulder Opal | #E204 Goldstone A High-Cut Black Crystal Opal

A High-Cut Black Crystal Opal Ring

light reddish overtones with a slight green and blue undertone pinfire color pattern

approximate crystal measurements: 1

The Setting: Freeform Bezel Set Ring

4.37ct Koroit Boulder Opal | #E204 Goldstone A High-Cut Black Crystal OpalKoroit Boulder Opal Weight (carats) 4. 37cts Origin Koroit Mining District, Queensland, Australia Shape Freeform Dimensions (millimeters) 17. 56mm x 10. 08mm x 3. 81mm Dimensions (inches) 0. 7" x 0. 4" x 0. 2" Body Tone (+N1 to N9 ) NA Boulder Brightness ( 1 to 5+) B3. 5 Predominant Colors Green Blue Directionality of Fire Slightly Directional Treatments Enhancements None Suggested Purpose Pendant Ring Sku Number #E204 Additional Notes None