925 Sterling Silver Pendent with Opal Gemstone - Silver With Black Opal - Stone Size : 5 x 7 - 6 x 8 MM - Oval Cab Cut - Unheated - Untreated. The Pendent Looks Even Better In Person And You Can See It Was Hard To Take A Picture That Showed The True Beauty. To Keep Item Looking Like New Just Wash Occasionally With Liquid Soap And Water. Please Do Not Use Harsh Chemicals Or Ultrasonic Cleaners. The pendant looks even better in person and you can see it was hard to take a picture that showed the true beauty. To keep item looking like new just wash occasionally with liquid soap and water. Please do not use harsh chemicals or ultrasonic cleaners.