Xennox Diamonds is a family-owned diamond jewellery company based in Brisbane, Australia, established in 1976. The company specializes in custom engagement rings, wedding rings, and fine diamond jewellery handcrafted in its on-site Brisbane workshop. Led by award-winning designer Karl Schwantes, Xennox offers both natural and lab-grown diamonds certified by GIA and IGI. Clients can work directly with experienced jewellers to design bespoke pieces using CAD renders and personalized consultations. With decades of experience, numerous industry awards, and thousands of positive customer reviews, Xennox has built a reputation for exceptional craftsmanship, transparent guidance, and outstanding customer service. The company also provides ring resizing, jewellery remodelling, diamond upgrades, valuations, and lifetime cleaning support.