The Croghan's Difference
The Four Cs
For over a century, Croghan's has guided discerning customers through the art and science of diamond selection. We believe the Four Cs tell only part of the story—our fifth C, Croghan's expertise, helps you see beyond the grades to discover a diamond's true beauty and soul.
We specialize exclusively in natural and estate diamonds. At this time, we do not sell, appraise, or provide repair services for lab-grown diamonds.
The Four Cs
Cut
Cut is the most important of the Four Cs—it determines how brilliantly a diamond reflects light and sparkles. Our gemologists at Croghan's pay special attention to cut quality, including the artistry of old-cut and hand-cut diamonds that showcase exceptional craftsmanship.
The Four Cs
Color
Diamond color is graded on the D-to-Z scale, with colorless stones (D-F) commanding the highest value due to their rarity. Near-colorless diamonds (G-J) appear white to the naked eye and offer exceptional value for discerning buyers. Vintage and antique diamonds often possess a warm, subtle hue that adds distinctive character and historical charm to these timeless pieces.
The Four Cs
Clarity
Clarity refers to the natural inclusions that form as diamonds develop deep within the Earth. Most of these inclusions are invisible to the naked eye, making them undetectable in everyday wear. An eye-clean diamond in the VS or SI range often represents the best value for discerning buyers. Our gemologists at Croghan's are here to help you identify the clarity grade that's right for your needs and budget.
The Four Cs
Carat
Carat measures a diamond's weight, not its size—a distinction that matters greatly when selecting your stone. A masterfully cut diamond can appear significantly larger than its carat weight suggests, offering exceptional visual impact. Our gemologists at Croghan's will guide you to find the perfect balance between carat weight, cut quality, and your budget.
Understanding Diamonds
Understanding the Four Cs—Cut, Color, Clarity, and Carat Weight—is essential to selecting the perfect diamond. Our master gemologists are here to guide you through each consideration and help you find a stone as unique as your story.
Find Her Perfect Diamond Ring
Diamond Engagement Rings
