Simple Ways to Detect a Real Diamond

Diamonds are among the most valuable and cherished gemstones but with many imitations on the market, it’s essential to know how to verify their authenticity. Whether you’re buying for an investment or a special occasion, here are five easy methods you can use to spot a real diamond before making a purchase.

The Fog Test

Hold the diamond close to your mouth and breathe on it like you’re fogging up a mirror. A real diamond disperses heat quickly, so the fog should disappear almost instantly within one to two seconds. If the fog stays longer, it may be a fake.

Check for Inclusions with a Loupe

Use a jeweler’s loupe to inspect the stone for natural imperfections or “inclusions.” Real diamonds often have small internal flaws, while fake ones like cubic zirconia tend to appear flawless. If you don’t have a loupe, visit a trusted gemologist like those at Agnigems for expert inspection.

Water Drop Test

Fill a glass with water and drop the loose diamond into it. A real diamond has high density and will sink to the bottom. Many fakes, such as glass or quartz, will float or hover mid-way.

Look for Sparkle and Refraction

Diamonds refract light in a unique way, giving off both brilliance (white light) and fire (colored light). Hold the diamond under light and observe the sparkle. If it shines only in rainbow colors and lacks depth, it may not be a genuine diamond.

Scratch Test

Real diamonds are one of the hardest substances on Earth. Try gently scratching a piece of glass with the stone. A real diamond will easily leave a scratch. Caution: This test can damage both the stone and the glass use it only as a last resort or consult a certified gem expert at Agnigems.

Trust the Experts at Agnigems

While these simple tests can help you spot obvious fakes, the most reliable way to confirm a diamond’s authenticity is through professional testing. At Agnigems, we offer certified gemstone consultancy in Kerala, helping you identify, value, and select authentic diamonds with confidence.