美国采购需求：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 in the market for a stylish diamond ring, specifically a size 7.5. I'm particularly interested in a ring featuring a lab-created emerald with a diamond cut, ideally in the range of 3.5 to 4.0 carats. Quality and craftsmanship are essential, so I would appreciate detailed info on your available designs, including any customizable options or unique features. Additionally, I'm keen to know about the pricing, potential bulk order discounts, and lead times for delivery. If you have any previous designs or collections that align with this request, please share images or links. Looking forward to hearing back with your offerings!