Toll-Free 888-331-7625 or 307-754-4681 | Shopping Cart | About Us - Company Info | Contact Us Page | Home Page Obsidian, silver sheen, 3/8 slabs $ 4.00 The silver sheen obsidian slabs are approx. 3/8" thick and a great thickness for a flintknapper for making arrowheads, knife blades, etc.  The silver sheen obsidian some times has a bit of color in it such as blue/purple for added interest.  Rather than fashioning an arrowhead or knife blade from a chunk of rough as the Native Americans did, a slab will save a lot of waste of material. Obsidian knives made from slabs are beautiful! Slabs may have from one to nine orders in one slab. Stock no. 558-3-8s Related Items Here are some products that may also be of interest to you: • Obsidian, silver sheen, OR slabs