Personally, I recommend BOJEM's Colombian emerald necklace, which has little oil. The weight of the main stone is 1.8 1ct. The main stone is rich in color, uniform and full, with little oil in the crystal and visible fluorescence. Both quality and cost performance are worth considering. On the other hand, there is no doubt about the collection value of emeralds. Isn't it best to buy emeralds and appreciate them in a few years?