Black Diamond - For over 90 years Diamond has made mattresses in the USA. Diamond products are made with the finest craftsmanship and attention to detail. All components and assembly is Made in America, Santa Fe Springs California. Choose from three collections to enhance your lifestyle. Destination Bed in a Box with ventilated cooling charcogel. Hybrid Lux Chill with 8 Degrees Cooler latest technology (in store only). Organic Latex Luxurious Hotel Suites Collection (in store only).