The materials produced by nature, which are beautiful, bền, khan hiếm, and have technological value, and can be processed into ornaments are collectively referred to as natural jewelry and jade. Including natural gems, ngọc tự nhiên và đá quý hữu cơ tự nhiên. 1. Natural gem stone Natural gemstones refer to single crystals (có thể chứa tinh thể kép) of minerals that […]
