Proper certification is critical when investing in a diamond tennis necklace. Trusted labs like GIA and IGI grade diamonds based on the 4 Cs: cut, color, clarity, and carat. These reports give you confidence in your purchase, whether the stones are natural or lab-grown. A certified necklace ensures authenticity, quality, and long-term value—making it not just a holiday treat, but an h... https://divourdiamonds.medium.com/diamond-tennis-necklaces-a-holiday-buyers-guide-for-2025-56f9a363a9de