Classic simplicity defines this delicate setting, which features a thin precious metal band that gently tapers towards a pear-shaped diamond accent on each side of the center gem.a marquise moissanite wedding band fit well under this alexandrite engagement ringProduct Information Engagement Ring: Metal Sterling Silver, 10k/14k/18k gold, Platinum Center Stone Alexandrite Shape Pear Weight approx 1carat Size 5x7mm Accent stones Moissanite Set Prong, Pave Set Alexandrite. Whether extracted from nature or created in a lab,alexandrite engagement ringsare a quick change artist, often noted as the ??emerald by day, ruby by night?¨¤ gemstone. ... Its 8.5 Mohs scale of hardness ranking make it agoodcontender forengagement ringsWhether extracted from nature or createdin a lab, alexandrite engagement rings are a quick change artist, often noted as the ??emerald by day, ruby by night?¨¤ gemstone. When this gemstone was first discovered in Russia in 1834, it was mistaken for an emerald. It wasn?£¤t until the light changed that the miners realized they had discovered an entirely new gemstone, and it was given the name ??alexandrite?¨¤ for the Russian Tsar Alexander II. Glistening under sunlight, alexandrite stones appear a vivacious teal-green color, but when paired with artificial or incandescent light, a deep purple or magenta color takes over. With such duality, alexandrite engagement rings are perfect for the free spirited soul.