This lovely authentic necklace is by David Yurman from the Albion collection. It is crafted from sterling silver with a high polished finish. The pendant is a cushion shape with the silver cable design and a bezel set cushion shape green amethyst (prasiolite) gemstone surrounded with 25 points diamond. It is attached to a sterling silver box link chain which secures with a lobster clasp and is fully signed by the designer with the metal content.Material: 925 silver Diamond: 25 points Color: H Clarity: VS1Gemstone: prasiolite green amethyst 7mm x 7mm Hallmark: D.Y 925 Measurements: chain: 17" long and 1.8mm thickPendant: 19.5mm long x 11.7mm wide x 6.2mm high Weight: 9.5 grams