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I'm interested in sourcing synthetic diamonds for a project I'm currently working on. Could you provide more details about your available products? Specifically, I'd like to know about the different grades, sizes, and any special features that set your diamonds apart. Additionally, if you have any certification information or testing standards that your diamonds meet, that would be helpful. It would also be great to get a sense of your pricing structure, minimum order quantities, and lead times for delivery. I'm looking to establish a reliable partnership, so any information regarding bulk order discounts or shipping options would be appreciated. Looking forward to your detailed response!