Green Helenite & clear gemstone NWT ring in sterling setting. Sz 5-3/4 and Marked 925 Vibrant green emerald shaped, fancy cut Helenite. Side gemstones most likely genuine topaz or zircon (not cubic zirconia). Gorgeous gallery in front and back measures appx. 6/8” x 6/8”. Helenite is a man-made glass made in a lab using volcanic ash from the 1980 Mount St. Helen’s eruption Pet and smoke free environment