Annieglass glass is hand made of slumped glass in California. Each piece gets its irregular, freeform, artistic shape from fire and ceramic molds. A plate of thick glass is allowed to "slump" down over a mold in a fiery-hot kiln. Most pieces are adorned with a thick band of gold and platinum for a more luxurious look. All pieces are dishwasher safe when you use a mild detergent and dried with a soft towel. We do not recommend microwave use.