Vintage Dog Head Hallmarked Pink Leaf Filigree 7.5

Ladies this Timeless Vintage ring is packed with character, get ready for the compliments! Age is unknown, Leaf filigree style edges, center pink hue stone is unknown. Size 7 1/2 see photos. Hallmark states STER on one side & a circled C with a French Dog head beside it...please see photos I researched quite a bit and found the last photo with similar hallmark?I’ve owned for at least 20 years,it was vintage when I bought it! Thanks so much for looking for free to check out my other items! 😊