28.22ct Quilpie Boulder Opal Stone | #20 Rhodochrosite 5 to 8 on the

5 to 8 on the Mohs hardness scale

including stones that visibly change color under different lighting conditions

The Setting: Custom Cast Prong and Pave Set Split Euro Shank Ring

The crystal has not been polished or shaped

Synthetic Alexandrite set in Sterling Silver

28.22ct Quilpie Boulder Opal Stone | #20 Rhodochrosite 5 to 8 on theAustralian Boulder Opal: Weight (carats) 28. 22cts Dimensions (millimeters) 31. 34mm x 16. 32mm x 7. 67mm Origin Quilpie Mining District, Queensland, Australia Shape pear shaped cabochon cut Colors red, green, blue, purple Brightness of Color Play ( 1 to 5+) 2 Darkness of Body (+1 to 5 ) N A Treatments Enhancements none, natural SKU Number #20 Additional Notes: Thickness of this stone makes it a versatile option for use in rings, pendants, and