Coro's thermoset designs helped define the accessible glamor of the 1960s. These saturated plastic elements gave jewelers the freedom to experiment with unconventional color palettes—lime green among the bolder choices. Thermoset was ideal for the clean, molded forms that Mid-Century Modern favored, and Coro embraced it across many seasonal lines. Though the materials were inexpensive, the sculptural quality and futuristic tones made these sets distinct from earlier rhinestone-heavy decades. Lime green, in particular, hints at the atomic-age fascination with synthetic color and consumer optimism.