enso rings classic birthstone silicone ring – unisex wedding engagement band – comfortable breathable band – 6.6mm wide, 1.75mm thick (alexandrite, 9) enso rings birthstones accompany a birth month, each having a unique meaning and significance. their popularity dates back to ancient times when civilizations believed that gemstones had incredible powers such as luck, health and prosperity. our new birthstone collection is handcrafted in-house and offers you a variety unlike any other.