Lưu trữ thẻ: wholesale natural jewelry

bán buôn trang sức thiên nhiên Baolong Sharing: Bao gồm đá quý và bông

Inclusions in gemology refer to three aspects: (1) The solid, liquid and gaseous substances inside the gemstone are called solid, liquid and gaseous substances. (2) The color zoning and distribution or growth pattern of gems. (3) Fractures, cleavage and cracks. The presence of inclusions often affects the quality of gemstones, but the regular arrangement of […]