Also known as horn-rimmed glasses, tortoise eyeglasses were named for their resemblance to a live tortoise shell. Tortoise glasses made their debut in the 1920s and were initially crafted of actual tortoise shells. No worries, though. These days, tortoise shell glasses are made of acetate. Their subtle pattern in shades of yellow and brown gives your face a soft look and beautifully complements your skin tones. Find beautiful tortoise glasses now at Express-Glasses.