7.37ct Koroit Boulder Opal | #E182 Hair monoclinic crystal system

monoclinic crystal system

showing minor eye-visible abrasions

A loose purple amethyst gemstone featuring a hybrid oval buff top cut

The Side Stones: White diamonds

14mm average

7.37ct Koroit Boulder Opal | #E182 Hair monoclinic crystal systemVivid Green Koroit Boulder Opal Weight (carats) 7. 37cts Origin Koroit Mining District, Queensland, Australia Shape Freeform Oval Dimensions (millimeters) 21. 30mm x 9. 71mm x 4. 11mm Dimensions (inches) 0. 8" x 0. 4" x 0. 2" Body Tone (+N1 to N9 ) NA Boulder Brightness ( 1 to 5+) B4. 5 Predominant Colors Green Directionality of Fire Somewhat Directional Treatments Enhancements None Suggested Purpose Ring Pendant Sku Number #E182 Additional Notes None