Main Stone: Top-grade natural topaz Shape: Heart-Shaped Main Stone Weight: 3.9-4 ct Cut: Millennium Diamond Cut Clarity: VS2 or above, clean and perfect to the naked eye Color: London Blue (Top Grade) Pendant Material: 18K white gold The main stone is topaz, inlaid with simple 18K gold, a classy choice Time required for customization: 7-10 working days for customized products, no returns or exchanges.