4.37ct Koroit Boulder Opal | #E204 Goldstone John's Island) in the Red

John's Island) in the Red Sea

play of color description: full color spectrum visible

Agate jewelry can safely be put into chemical and ultrasonic cleaners

Colors are bright and vibrant

The matrix (host rock) is rich brown ironstone

4.37ct Koroit Boulder Opal | #E204 Goldstone John's Island) in the RedKoroit 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