Polish Flint One Slab. Cabbing rough, knapping, pendants (Poland)Hard material, takes a high-gloss polish, great fine grain material, knapps great. Small fractures are common with this material. Description/details: · Approximate Hardness: 6.0-7.0 · Approximate Size at largest points: 5-1/4" x 2-1/4" x 6.3 mm thick. · Slab appears to be solid with a couple of fractures (see pictures) · Takes a high-gloss polish. · Pictures taken wet under indoor light . · Picture shows the actual material you will receive. · Your satisfaction is guaranteed. Note: Thermal fractures are a common occurrence with most rock. We do our best to be accurate in the description of materials, noting any visible fractures or flaws. If for some reason you are not happy with your purchase, please contact us and we will make it right.