This unusual agate resembles the skin of a snake in appearance, thus the name Snakeskin Agate. The material ranges in color from a pink, cream, tan, reddish browns, with shades of these colors. The snakeskin agate is actually a chalcedony, a microcrystalline variety of quartz. Hardness 7 on the Moh’s scale. Snakeskin Agate is considered a gemstone.