Advances in technology and increased demand for lower-priced gem materials contributed to the proliferation of new treatments throughout the first decade of the 2000s. The developments that made the ...

完整的 4C 评估，并附有净度特征标绘图。实验室培育钻石的腰围上会用镭射刻字技术刻上“Laboratory-Grown”（实验室培育）字样和 GIA 报告编号。适用于颜色为 D 到 Z 级、重 0.15 克拉或以上的未 ...