Moissanite stones of 0.1 ct and above ship with a GRA certificate; below that, no stone certificate is issued.
There is no self-serve download for other compliance documents. Email [email protected], naming the market you sell into and the document your marketplace or regulator asks for, if you need: Proposition 65 statements, REACH documentation, metal safety / heavy-metal test reports, or to submit a reseller or tax-exemption certificate. Material testing is done per SKU (see Selling into the EU: GPSR, product testing, and VAT for EU specifics). Paid inspection reports for specific products typically cost upwards of $500 per item with a turnaround of around 15 business days; send us the product links for a quote.
On your own store you can state the metal, the plating, and that pieces are lead-free and nickel-free. Don't describe a piece as certified, hallmarked, or independently tested unless you hold the document for that specific product.