Created to exacting standards, using state-of-the-art gem-lab technology and minute attention to detail, this lab-grown emerald has a chemical make-up identical to the finest emeralds. the gemstone features a lush, more intense green than the natural gemstones can offer, making it a dependable, affordable and popular choice in place of natural emerald gemstones. the gemstone performs at the bench just as a natural gemstone does. Unlike natural emeralds, however, this gemstone is heat-resistant and can be successfully cast in place. Emerald is the birthstone for May. ​​​​​​Round-cut gemstones are highly popular and the most commonly available. Rio round gemstones are calibrated for size and hand inspected to ensure maximum attractiveness.