Emerald is the best quality product from Colombia. โดยทั่วไป, a good-quality emerald has a market price of $10,000 ต่อกะรัต. Because the emerald has a very shallow bottom, low refractive index, less fire, the first emphasis is on color and cleanliness. ดังนั้น, to choose emeralds, first look at the color, the color should be […]
