Do Lab Diamonds Pass Diamond Testers?
Yes, lab diamonds pass diamond testers. Most diamond testers work by measuring thermal conductivity, which is how quickly heat travels through a stone. Because lab diamonds have the same chemical composition and crystal structure as natural diamonds, they conduct heat in the same way. As a result, standard handheld testers will identify lab-grown diamonds as real diamonds.
If you want to understand more about how lab diamonds compare to natural diamonds, you can read our detailed guide on Are Lab Diamonds Real.
How Diamond Testers Work
Diamond testers are commonly used by jewelers, pawn shops, and buyers to quickly verify whether a stone is a diamond.
Most diamond testers function by measuring thermal conductivity. Diamonds conduct heat extremely efficiently compared to other gemstones.
When the tester touches the stone, it sends a small amount of heat through the tip. If the heat transfers quickly through the stone, the device registers it as a diamond.
Because both natural diamonds and lab-grown diamonds share the same carbon crystal structure, they transfer heat in the same way. This means a standard diamond tester cannot distinguish between the two.
If you want to explore certified stones, you can browse our Lab Diamond collection featuring a variety of cuts and styles.
Why Lab Diamonds Test as Real Diamonds
Lab diamonds are chemically identical to natural diamonds. Both are made entirely of carbon atoms arranged in a crystal lattice structure.
This structure gives diamonds their famous properties, including:
• exceptional hardness
• high thermal conductivity
• brilliant light reflection
• durability
Because these properties are identical in both types of diamonds, lab diamonds will register as real diamonds when tested with most standard tools.
This is why many buyers today choose lab diamonds for engagement rings and fine jewelry, as they offer the same beauty and performance as mined diamonds.
You can explore available designs in our Engagement Rings collection.
Can Jewelers Tell the Difference Between Lab and Natural Diamonds?
In most everyday situations, jewelers cannot distinguish between lab diamonds and natural diamonds using only visual inspection.
However, gemological laboratories can identify them using specialized instruments that analyze the diamond's growth characteristics.
These machines examine factors such as:
• crystal growth patterns
• microscopic inclusions
• trace elements
• fluorescence patterns under UV light
These advanced methods allow gemologists to determine whether a diamond formed naturally underground or was grown in a laboratory environment.
Despite these differences in origin, both diamonds look identical to the naked eye and share the same durability and brilliance.
Why Lab Diamonds Are Becoming More Popular
Over the past decade, lab diamonds have become increasingly popular among modern buyers.
Many couples now choose lab diamonds for engagement rings because they offer excellent value without compromising on beauty or durability.
Some reasons buyers choose lab diamonds include:
• larger diamond sizes for the same budget
• identical sparkle and brilliance
• certified grading from gemological institutions
• modern and innovative sourcing methods
Because of these advantages, lab diamonds are now widely used in engagement rings, earrings, pendants, bracelets, and other fine jewelry pieces.
Choosing the Right Lab Diamond
When selecting a lab diamond, experts recommend paying attention to the 4Cs of diamonds:
Cut
The cut determines how well a diamond reflects light. A well-cut diamond produces maximum brilliance and sparkle.
Color
Diamond color is graded from colorless to light yellow. Higher grades appear brighter and more valuable.
Clarity
Clarity refers to small natural inclusions or marks inside a diamond.
Carat
Carat refers to the weight of the diamond, which affects its size.
If you want more flexibility when choosing your diamond, you can browse our Loose Stones collection and select a center stone before choosing a ring setting.
Lab Diamonds in Modern Jewelry
Today, lab diamonds are used in a wide range of jewelry designs including:
• engagement rings
• wedding bands
• earrings
• necklaces
• bracelets
Because lab diamonds are more affordable than natural diamonds, many buyers can select larger stones or higher-quality grades while staying within their budget.
If you're exploring options, you can browse our Lab Diamond collection to see available designs and certified stones.
Conclusion
Lab diamonds pass diamond testers because they share the same physical and chemical properties as natural diamonds. Standard testers measure thermal conductivity, and both types of diamonds conduct heat in the same way.
For this reason, most handheld testers will identify lab diamonds as genuine diamonds.
For buyers looking for brilliant, durable, and certified stones, lab diamonds offer an excellent option that combines beauty with modern technology.
If you want to explore available options, you can browse our Lab Diamond collection and discover a variety of styles suitable for engagement rings and fine jewelry.