Toll-Free 888-331-7625 or 307-754-4681 | Shopping Cart | About Us - Company Info | Contact Us Page | Home Page Obsidian, mahogany black lace slab, OR $4.00 Slabs of mahogany black lace obsidian are from Oregon. A double flow pattern of color in obsidian with black and reddish brown swirls with smoky/clear and black areas. The slab pictured is approximately 3" X 6", (3 orders) which means you should order three to get a similar slab. An order of one will be a sample slab containing 5 square inches. The obsidian is very good quality which will make some beautiful cabochons. Stock 542s Related Items Here are some products that may also be of interest to you: • Rough: Obsidian, mahogany black lace