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Text Us - (215) 922-1501
Family owned - We care for our customers
Diamond Buyers in Philadelphia
TNS Diamonds has bought diamonds on Philadelphia’s Jewelers’ Row since 1991. We buy loose stones, engagement rings, diamond jewelry and estate pieces. Bring your diamond in and we’ll assess it while you wait, explain what we’re seeing and make an offer. There’s no obligation to accept it.
Sell my Diamonds
How Selling Your Diamond Works
What We Buy
Loose diamonds, engagement rings, wedding sets, earrings, tennis bracelets, pendants and estate jewelry. We buy certified and uncertified stones, and pieces that are broken, dated or missing stones.
How We Value Your Diamond
Carat weight sets the range. Color and clarity move the price within it, and cut matters more than most sellers expect. A GIA report makes a stone faster to price and usually supports a stronger offer.
Selling in Person, Not by Mail
Online buyers ask you to post your diamond and wait for an offer you can’t discuss. Here you watch the stone being assessed, ask why the number is what it is, and it never leaves your sight.
Free Valuation, No Obligation
The valuation is free and you don’t have to sell. Plenty of people come in to find out where they stand and leave with the piece.
Need a quicker quote?
Text Us Photos of Your Diamond for an Immediate Price Quote.
Sell Us Your Diamonds
Whether you have a loose diamond or a diamond set in a ring or pendant, TNS Diamonds offers competitive prices and discreet, professional service. Located on Philadelphia’s historic Jewelers’ Row, we specialize in evaluating natural diamonds of all shapes, sizes, and certifications. You’ll receive a fair offer based on clarity, color, cut, carat weight, and current market trends.
Do you buy loose diamonds and diamond jewelry?
Yes. We buy both loose diamonds and those set in rings, earrings, pendants, or other jewelry.
Do you buy lab-grown diamonds?
We typically focus on natural diamonds but are happy to evaluate lab-grown stones on a case-by-case basis.
Does the diamond need to be GIA certified?
Certification helps, but it’s not required. We evaluate all diamonds regardless of paperwork.
What if I don’t know my diamond’s quality?
No problem. Our team will assess the diamond in-store and explain how we arrive at the offer.
Will I receive an offer right away?
Yes. After our evaluation, we’ll make an immediate offer with no pressure to accept. You can text us at 215-922-1501 to set up a consultation.