How Do Pawn Shops Determine Diamond Authenticity?
- Pawn & Jewelry Exchange

- Nov 3
- 3 min read
If you’ve ever thought about pawning or selling a diamond, you’ve probably wondered how pawn shops can tell whether a diamond is real or not. At The Pawn & Jewelry Exchange, we help customers in Greensburg and nearby Latrobe understand the process behind diamond testing and evaluation. Our goal is to make sure every appraisal is fair, transparent, and backed by expert knowledge.

Why Diamond Authentication Matters
Diamonds vary greatly in quality and value, so determining authenticity is essential. When we appraise a diamond, we’re not just checking if it’s real; we’re also evaluating its size, clarity, color, and overall quality.
By confirming authenticity, we protect both you and our shop from counterfeit or misrepresented stones. It also ensures you get the most accurate and fair offer possible based on the diamond’s real characteristics and market value.
How We Identify Real Diamonds
At The Pawn & Jewelry Exchange, we use several professional methods and tools to determine whether a diamond is genuine. Here’s how the process typically works:
1. Visual Inspection
Our evaluation begins with a detailed visual inspection using a jeweler’s loupe or microscope. We check for characteristics that are unique to natural diamonds, such as tiny inclusions, internal reflections, and sharp facet edges.
Lab-created or imitation diamonds often have smoother edges, perfect symmetry, or no inclusions, details that can give them away quickly to an experienced jeweler.
2. Thermal Conductivity Testing
Real diamonds disperse heat much faster than imitation stones. We use a diamond tester, a handheld device that measures thermal conductivity, to verify whether a stone conducts heat at the rate of a genuine diamond.
Moissanite and cubic zirconia, which look similar to diamonds, conduct heat differently, making them easy to distinguish using this method.
3. Electrical Conductivity Testing
While thermal testing is effective, some high-quality imitations can still pass. That’s why we may also perform an electrical conductivity test, especially for stones that could be moissanite. This test detects how the gem reacts to electricity, further confirming authenticity.
4. UV Light Examination
Under ultraviolet light, many diamonds emit a bluish fluorescence, while imitations typically don’t. Although fluorescence alone isn’t enough to confirm authenticity, it provides another clue in the overall assessment.
5. Weighing and Measuring
Diamonds are typically lighter than cubic zirconia and other common substitutes. We use precision scales and calipers to compare the stone’s weight and dimensions. Even small differences can indicate whether a diamond is real or synthetic.
6. Certification Review (If Available)
If you have documentation from organizations such as GIA (Gemological Institute of America) or IGI (International Gemological Institute), bring it with you. Certified diamonds often receive higher offers because they’ve already been verified by trusted grading institutions.
How We Appraise Diamond Value
Once authenticity is confirmed, we move on to appraisal. Pawn shops use the “4 Cs”, cut, color, clarity, and carat weight, to determine value. Market demand and resale potential also play a role.
At The Pawn & Jewelry Exchange, we combine these traditional appraisal standards with current market data to make sure our offers reflect real-world pricing. Whether you’re pawning or selling, our goal is always to give you a fair and transparent offer.
Why Work With a Licensed Pawn Shop
Not every pawn shop has the experience or equipment to evaluate diamonds correctly. Working with a licensed and reputable pawn shop ensures your diamond is tested professionally and ethically.
At The Pawn & Jewelry Exchange, we use industry-standard tools, certified methods, and years of expertise to guarantee accuracy. Customers in Greensburg, Latrobe, and surrounding towns trust us because we handle every piece with care and provide honest explanations of our evaluations.
Tips Before Bringing in Your Diamond
If you plan to pawn or sell your diamond, here are a few tips to get the best experience and value:
Clean your diamond gently before bringing it in to ensure a clear inspection.
Bring documentation or certificates if you have them.
Know your diamond’s approximate characteristics so you understand your appraisal.
Choose a shop with expertise in jewelry and gemstones, not just general items.
Let’s Appraise Your Diamond with Confidence
At The Pawn & Jewelry Exchange, we take pride in offering expert diamond testing and fair appraisals. Our trained team uses advanced tools and honest communication to ensure every customer feels confident in their transaction.
If you’re in Greensburg, Latrobe, or nearby areas and want to verify or sell your diamond safely, visit us or call today. We’ll walk you through the authentication process, explain your diamond’s value, and provide a fair, transparent offer. Contact The Pawn & Jewelry Exchange at (724) 836-7296 and get your diamond evaluated by professionals you can trust.






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