0.90ct Lightning Ridge Black Semi-Crystal Opal | #E42 Aventurine Incredibly rare variety of tricolor

Incredibly rare variety of tricolor tourmaline found in Vietnam

The Setting: Bezel Set Split Shank Ring

Often used as an alternate birthstone to topaz for the month of November

An eye-catching statement from the Mid-century Modern jewelry era

measurements: 31

0.90ct Lightning Ridge Black Semi-Crystal Opal | #E42 Aventurine Incredibly rare variety of tricolorLightning Ridge Black Semi Crystal Opal Weight (carats) 0. 90cts Origin Lightning Ridge, Australia Shape Freeform Triangle Dimensions (millimeters) 8. 98mm x 7. 18mm x 2. 47mm Dimensions (inches) 0. 33" x 0. 3" x 0. 1" Body Tone (+N1 to N9 ) N2 Semi Crystal Brightness ( 1 to 5+) B1 Predominant Colors Blue Only Directionality of Fire Very Directional Treatments Enhancements None Suggested Purpose Ring Pendant Sku Number #E42 Additional Notes None