Buy Like We Buy
Diamond Bridal & Engagement Rings
Take the mystery out of buying your perfect diamond ring!
At The Diamond Authority, we believe the process of choosing a bridal or engagement ring should be as special and straightforward as the love it symbolizes. We take the mystery out of the process, giving you the tools and guidance to make an informed decision.
From timeless pieces to custom designs crafted to your vision, we prioritize quality, craftsmanship, and clarity.


Diamond Guide
Diamonds are among the most precious and enduring gemstones, celebrated for their beauty, rarity, and timeless appeal.
Diamonds have long been cherished for their extraordinary beauty and enduring allure. At The Diamond Authority, we believe that understanding the essence of diamonds helps you make a confident and meaningful choice when selecting a piece that will last a lifetime.
The Different Types of Diamonds
Diamonds come in many shapes and styles, each offering a different look and feel. Some of the most popular diamond cuts include:

Round Brilliant
The classic and timeless round shape is known for its brilliant sparkle and is always a top choice for those seeking exceptional radiance.

Princess Cut
With its modern square or rectangular shape, the princess cut is known for its sharp brilliance and contemporary elegance.

Cushion Cut
Often referred to as the “pillow cut,” the cushion cut offers a softer, romantic appearance with rounded corners that add to its vintage charm.

Emerald Cut
Elegant and sophisticated, the emerald cut features long, rectangular facets that emphasize clarity and shine in a more understated way.

Oval Cut
Combining the beauty of the round cut with an elongated shape, the oval cut is graceful and unique, offering a beautiful alternative with plenty of sparkle.
The 4 Cs
Cut, Color, Clarity, and Carat Weight
When choosing a diamond, the 4 Cs—cut, color, clarity, and carat weight—are the key elements that determine a diamond’s unique beauty and value.
Cut
The cut of a diamond shapes the way it reflects light, and this is what gives a diamond its brilliance. A beautifully cut diamond will sparkle with life and light, showcasing its true radiance. A well-balanced cut makes all the difference.
Color
Diamonds come in a range of colors, from colorless to shades of yellow or brown. The best diamonds are those with little to no color—graded from D (colorless) to Z (more noticeable yellow or brown). A truly colorless diamond is rare and highly valued.
Clarity
Clarity refers to the tiny imperfections—known as inclusions and blemishes—that may be present within or on the surface of a diamond. The fewer imperfections a diamond has, the rarer and more valuable it becomes. Flawless diamonds are a rare treasure.
Carat Weight
Carat weight measures a diamond’s size, but it’s important to remember that the carat weight alone doesn’t determine its value. The overall beauty of the diamond, as influenced by the cut, color, and clarity, is what truly makes it special.


Natural vs. Lab-Grown Diamonds
Diamonds come from the earth, formed over millions of years under intense heat and pressure. These natural diamonds are rare and unique, with each one telling its own story. In addition to natural diamonds, lab-grown diamonds are becoming an increasingly popular choice. Created using advanced technology that mimics the natural diamond-forming process, these diamonds are chemically identical to natural ones, offering a more affordable and sustainable option.
Caring for Your Diamond

Book Your Appointment Today
Ready to find your perfect piece? Schedule your visit and see why Jeremy and Dave are Portland’s top choice and your authority for fine jewelry.
A Century of Expertise
With over 100 years in the industry, our legacy of knowledge and skill ensures every piece is crafted to perfection.
Jewelry for Every Moment
Whether it’s a milestone celebration or a simple “just because,” our collection has something perfect for every occasion.
Diamonds for Every Preference
Choose between natural diamonds and sustainable lab-grown alternatives, each offering unparalleled beauty and brilliance to fit your values.