Travertine is a form of limestone deposited by mineral springs, especially hot springs. Travertine often has a fibrous or concentric appearance and exists in white, tan, cream-colored, and even rusty varieties. Cut from a quarry in New Mexico we like to handpick the most interesting specimens that are mixed with large quantities of Onyx. Some have ornate crystal enclosures, others are colorful and offset stunningly the fine bonze figurines finish. This rock is harder to cut and has more variations than Texas Shellstone.