Alaskan Silk stone is an Tigereye / petrifiedwood combination stone with a beautiful, silky-smooth surface and satin finish. It features black banding that wraps around a grey-to-white background. The Romans were experts at glyptography (the carving of layered stones to reveal different colors) and crafted beautiful seals from this stone. The patterns were cut in negative relief. Engravings with a negative picture are called intaglios and those with raised image are cameos. In the Middle East, tigereye was associated with sorcerers.