Toll-Free 888-331-7625 or 307-754-4681 | Shopping Cart | About Us - Company Info | Contact Us Page | Home Page Spider jasper slabs $4.00 A sample slab of spider jasper from Mexico will contain five square inches. This unique gemstone is reddish brown with crystals throughout the rough in small star or spider designs about 1/2 inch across. The different hardness of the two materials make for an interesting polished cabochon. Polishing procedures using diamond give nice results. Stock 380s. Related Items Here are some products that may also be of interest to you: • Rough: Spider jasper, Mexico • Spider jasper cab, not for sale