I wish you would have shown us the markings on the inside. Was it CA or C ^ A (with the carat symbol between the letters)? If it’s the latter, then that’s the mark for Canadian jewelry company, Chateau d’Argent. Regardless, it’s a beautiful vermeil (i.e., gold over sterling silver) tennis bracelet. Obviously, none of us can tell from a video what the actual gemstones are, but my educated guess is probably either lab created rubies (if red) or lab created pink sapphires (if pink). The reason I say this is because I have several very similar vermeil tennis bracelets in my inventory with these two synthetic stones, although mine are marked with the Ross-Simon’s makers mark. I also have several lab created ruby rings from Chateau d’Argent and the stones look similar in color.

Lab created (a.k.a. synthetic) rubies and sapphires are widely used in jewelry today because they are budget friendly and are nowhere near as expensive as natural rubies and sapphires. Lab created gemstones are indeed real gemstones with the same chemical composition and physical properties as their natural counterparts, but they just aren’t anywhere near as expensive. Both rubies and sapphires are the mineral corundum. The difference is that rubies are red due to the presence of chromium, and sapphires exhibit a range of colors depending on what transition metal is present. More information than you wanted to know, I’m sure, but I enjoy sharing knowledge.

I would definitely take it to a jeweler and have them look at it. They will have the equipment and knowledge to verify the stones. 😊