Antique looking necklace

Hello I’ve just rediscovered this lovely necklace, found it years ago and thought it was just old costume jewellery, but I have just been looking at it and noticed that it was very heavy then I noticed that the metal looks like rose gold under the dirt, noticed heart shaped links that the stones and enamel bits hang from, it seems like a very well made and a lot of thought must have gone into it. But no marks I can see, enamel work looks really good too. I’m wondering how old it might be, not sure if it’s deco but the faceted stones look from around that time maybe.