巴基斯坦采购需求：实验室培育裸钻、实验室钻石首饰、实验室培育毛坯钻石、钻石、CVD毛坯钻石、实验室制造钻石

I'm looking to source HPHT lab-grown diamonds ranging from 1 carat to 3 carats. Could you provide details on the available options, including sizes, shapes, and color grades? Pricing information and lead times would also be appreciated. Additionally, if you have any certification or quality assurance documents for the diamonds, please send those over. I'm interested in understanding the overall quality and value of your offerings before making a decision. Thanks!