Hello, welcome to my listing. Up for sale is this beautiful pendant necklace. This is from Canada; the company's name is Chateau D Argent. Founded in 1982. It is marked on the back with their signature C^A 925 on the bottom back of the pendant, the top back is marked Canada. It has a 12mm. by 10mm. genuine Aqua Marine stone. It comes on a designer Heng Ngai 925 gold vermeil 18-inch box link chain. I took a picture of the stone with a black light as you can see in my pictures, it glows. This is how you can tell if it is a true Aqua Marine stone. This piece is in very good condition. Comes in a nice velvet gift box. A nice wearable collectible for a low price. If you have any question, please ask. Thank you and have a wonderful day.