This necklace features a simple gold chain with a blue gemstone charm. - Color: 10K Pink Gold - Design: Simple chain necklace - Gemstone: Blue Topaz - Clasp: Lobster clasp - Chain Type: Thin link chain I have lost the certificate, but when I had it repaired at Tsutsumi, they confirmed it was a Tsutsumi product. The chain broke and was repaired, but it is in beautiful condition. As this is a used item, please understand that there may be minor scratches. Item will be shipped as the necklace only. Thank you for viewing.