Alfa Mirage Precious Metal Tester GK-300

Protect your investments from "deep fakes" without a single scratch. Acid testing and electronic pens are great, but they only test the surface of a metal. If you want to know if a heavy gold chain or valuable coin is secretly filled with cheap lead or copper, you need to test its density. Engineered in Japan, the Alfa Mirage GK-300 uses the foolproof science of water displacement to calculate the exact purity of your gold straight through to the core. It is the ultimate non-destructive truth-teller for coin collectors, thrifters, and smart jewelry buyers.

Why You’ll Love It

• Zero Damage, 100% Accuracy: Keep your valuable coins and pristine jewelry in perfect condition. This machine uses absolutely no harsh chemical acids or metal files, relying entirely on clean water to test density.

• Catches Heavy Plating: Because it measures the overall mass and volume, it immediately exposes counterfeit items that are plated in real gold on the outside but filled with worthless metal on the inside.

• Verify the Manufacturer's Stamp: Don't trust a "14K" stamp blindly. The digital display instantly reveals the true karat (from Lo, K9 up to K24 and 99% purity), letting you know if a piece is under-karated or fake.

• A Highly Precise Everyday Scale: When you aren't hunting for fakes, this compact machine doubles as a highly accurate standard digital gram scale (weighing from a tiny 0.01g up to 300g) and a general densimeter.

Important Testing Limitations (Please Read)

To ensure you get the perfect tool for your needs, please note that because this machine relies on water displacement (density), it CANNOT test the following items:

• Hollow Jewelry: Water cannot enter the hollow spaces, which will completely skew the density reading.

• Jewelry with Gemstones: Stones have different densities than metal. (All stones must be removed prior to testing).

• Metals with Identical Density: It cannot distinguish metals that share the exact same density as gold (such as Tungsten).