First and the foremost important point one should consider before buying is the place from where one is planning to buy. Check how authentic is the place or the website before buying the Emerald.
Buy authentic lab-certified Emeralds only.
Check for the cut, color, and clarity of the gemstone. If you want to wear an emerald gemstone for astrological purpose, then color matters the most.
The best place to consider the purchase of Emerald is MyRatna. As the best quality and lab-certified gemstones are available here at the best possible prices.