Teenager In Protective Mask Studying In Classroom Listening To Lecturer GREEN AMETHYST STERLING SILVER RING VINTAGE STYLE ART DECO SOLITAIRE ROUND CUT. This vintage style ring features a round cut green amethyst (prasiolite) set in a sterling silver setting. The Art Deco style setting is beautifully crafted with an octagon setting and engraved details on the substantial shank. The amethyst is a natural, earth mined stone. The ring measures 9. 9mm across (north south) and 8. 2mm from finger to top. Please note that colors can vary slightly depending on your monitor and display settings. The video features this setting with a rhodolite garnet center. This version is also available in our shop.