Vintage Art Deco Art Noveau Opal Sterling Silver Woman Flower Crown Size US 8.5

Vintage Art Deco Art Noveau Opal Sterling Silver Woman Flower Crown Size US 8.5. Gorgeous Sterling Silver Ring handmade, found similar online but none that were this exact. Could not find a marking but there is a slightly flatter side on the left hand side that seems like something was meant to be stamped but didn‘t read clearly? Weighs at 8.57 grams. Opal looks real, cloudy in inside lighting but beautiful shift outside, I am unsure of authenticity though please note that.