Lab Ruby engagement rings? Absolutely! Diamonds may be a girl's best friend, but Lab Ruby engagement rings are a unique, original, and a far more affordable choice. Gem of hot summer nights and steamy red sunsets, ruby is the birthstone of July. Show the world the passions within you with a fiery ruby ring. The birthstone of June, Alexandrite is an amazing and mysterious stone. A created alexandrite ring is a unique and entertaining attention getter.