Acetate looks similar to Lucite (acrylic resin), but this form of plastic actually begins with acetic acid (also known as household vinegar), combined with various bases to give it the desired colors and texture. It's strong, lightweight, slightly flexible, and remarkably hypoallergenic. This combination makes it popular for eyeglass frames as well as jewelry.
Tortoiseshell has been used in jewelry and hair accessories for over 2,000 years. The attractive coloration, patterning and light weight of the hawksbill sea turtle shell made it a worldwide favorite for hair accessories and eyeglass frames... and made it a Critically Endangered species. Due to the scarcity and popularity of genuine tortoiseshell, imitations gained popularity over 100 years ago.
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