Crazy Lace Agate Necklace: The Laughter Stone Crazy lace agate, also known as Mexican agate, is a type of quartz with iron and aluminum traces characterized by intricate and vibrant hues and a finely crafted surface with distinct lace-like patterns. The gemstone displays various colors, including green, grey, black, brown, red, and pink. Despite being relatively new compared to other minerals, it has been used as a protective amulet for centuries and is now sought after as a rare and unique jewelry item.