Serving all of Rhode Island from 9 locations in and around Providence

24 Hour Service

Diamond Four C's - Logo

You can earn top dollar for your diamonds and diamond jewelry when you visit one of our 8 convenient locations. When you come to Diamond Four C's, you'll get accurate appraisals for all kinds of diamonds from our on-site GIA graduate diamond grader. When you sell to us, you can earn an extra 25% payout on the weekend.

Get cold, hard CASH for your diamonds

Professional assistance in buying diamonds

If you're in the market to buy diamonds or diamonds jewelry, our grader can help you make a wise choice. Let us educate you about the 4 C's of diamonds — clarity, color, cut, and carat. You'll understand what you're buying and why it's valuable.


Special orders are welcome, so visit one of our locations when you need an engagement ring, a wedding band, or any kind of diamond jewelry. Call or drop in for a FREE estimate.

Call or Visit Our Locations

for a FREE Estimate

for Your Diamonds


  • Diamond appraisals

  • Retail and wholesale loose diamonds

  • Diamond settings

  • Broken diamonds

  • Engagement rings

  • Earrings

  • Necklaces

  • Small diamonds

123 PicMonkey Collage

Accurate diamond grading and education