Utah Tiffany Opal stone Old stock **hxtled slab.  Beautiful dark purple material that is highly reactive to shortwave UV light.  Gorgeous colors and brecciated patterns. 

146.9 grams

118.18 x 106.92 x 6.84 mm

**Hxtal is a 100 year clear glass epoxy that is used to stabilize Tiffany opal stone, it adds to the wearability and enhances polish. You can completely remove if you like simply by soaking in acetone. Since all of my stones are intended as lapidary rough. I sometimes treat pieces prior to them being sold to aid in the cutting process once received. If you just want the hxtal off the surface, You can scrape it off with a warm razor blade.  Either way if you polish these stones this will help them more than harm them.