Agatized Cathedral Valley Utah hxtled petrified wood end cut. Beautiful colors and wood patterns. Don’t see this colorful wood often from this area. 150.09 x 111.73 x 36.51 mm. Hxtal is a 100 year clear glass epoxy that is used to stabilize gem bone, it adds to the wearability and enhances polish. You can completely remove if you like simply by soaking in acetone. Since all of my bone is intended as lapidary rough. 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 bones this will help them more than harm them.