Special grade product: màu xanh lá, màu vàng-xanh, with some cracks and impurities, mờ, and the weight is above 50kg. First-class product: Aquamarine, xanh nhạt, màu vàng-xanh, with some cracks and impurities, mờ, and the weight is more than 10kg. Second grade product: Aquamarine, xanh nhạt, không có vết nứt, a little impurity, and a block weight above 5 kg. thứ ba […]
