White and gray banded chalcedony agate from India is a high quality fortification agate. (Stock 290) The weight of the rough pieces run from 1/2 pound to 15 pounds each. This white to blue/gray chalcedony agate will make some beautiful polished cabochons and more, or just polish the face for an interesting specimen. This is the most dense agate we have slabbed in a long time. While slabbing large chunks, you will probably have to sharpen your blade several times before completing the slab. See Common problems when using your rock saw listed under LAPIDARY TIPS for tips on sharpening your saw blade. Some material is thought to have iris agate effects showing colors of the rainbow. For iris agate effects, the slabs are sliced very thin across the layers, then polished. See the beautiful translucent slabs of white and gray banded agate.