Diamond Authority

The Diamond Authority is an appointment-only jewelry business in Portland, Oregon, led by owners Jeremy and Dave, who bring more than 100 years of combined industry experience. The company emphasizes transparent pricing, personalized guidance, and working directly with its owners and jewelry experts. Its diamond selection includes GIA-certified earth-mined stones and lab-grown diamonds. For eligible GIA-certified mined diamonds, the business says it shows customers the actual invoice and charges 20% above invoice.

Services include custom-designed bridal rings and other made-to-order jewelry, as well as expert repairs to restore treasured pieces. Customers can also buy wedding and engagement rings, wedding bands, and other fine jewelry. The Diamond Authority purchases unwanted gold and silver, offering customers payment for their items. Located in Lincoln Tower on SW Greenburg Road, across from Washington Square, the business invites clients to book a private appointment. Its focus is on helping customers choose jewelry for engagements, milestones, and everyday occasions with knowledgeable service and clear communication.