Crazy lace agate is a banded chalcedony from Chihuahua in northern Mexico, famous for wild, looping patterns in cream, red, orange, grey and yellow. The bands twist into swirls, zigzags and little eye shapes, which is how it earned the crazy part of its name. Locals call it the laughing stone for its cheerful look. It formed around 65 to 90 million years ago as silica-rich water filled cracks in limestone, building up layer by colourful layer.
Like its agate relatives, crazy lace sits at 6.5 to 7 on the Mohs scale with good toughness, so it happily handles daily wear. It is cut as cabochons and beads, and cutters often hunt through rough for the most dramatic swirls, meaning every finished stone is one of a kind. It suits statement pendants, rings and bracelets. Care is easy: warm, soapy water and a soft brush. Some material is dyed to boost the reds, so ask if colours look unusually loud.
A family of patterned agates, each with its own signature markings and colours.
