Natural raw rough piece of white rainbow moonstone is set in .925 solid sterling silver with adjustable polished band This “rough” piece of moonstone is smooth to the touch, but not polished like a cabochon. Ring face is approximately 0.3” wide 0.6”mm long Raw moonstone chunk- 8mm by 14mm Measures at 5 on mandrel when adjusted to smallest setting. When band is adjusted to size 7, there a small gap. I have worn it this way and it’s completely comfortable and looks great. Polished band is 3.5mm Stamped 925 for 92.5% solid sterling silver