This stunning necklace Stone and Diamond measures approx 1 1/2 inches tall. The stone is a translucent green with a touch of blue, its quite possibly Sea Green Apatite or Light Green Blue Aquamarine. I have no idea if the diamonds are real or paste. Is belonged to my My late grandmother was born in 1900 and did a great deal of traveling and collected many items. This was in a jewellery box heavily tarnished,it it is silver but not hallmarked. It is in excellent condition and is truly stunning and highly sought after. If you have any questions or would like more photos just ask. This is such a very beautiful item.