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Home Shop Gold Tester Alfa Mirage Precious Metal Tester GKS-300
Alfa Mirage GKS-300 precious metal tester weighing a gold chain and jewelry.
Top view of Alfa Mirage GKS-300 density scale with water tank and weighing tray.
Alfa Mirage GKS-300 showing 22K gold purity result on its digital blue display.
High-precision Alfa Mirage GKS-300 analyzer for gold and platinum verification.
Calibrating the Alfa Mirage GKS-300 gold tester with a standard metal weight.
Complete GKS-300 kit: scale, tank, tweezers, thermometer, adapter, and weights.
Alfa Mirage GKS-300 precious metal tester weighing a gold chain and jewelry.
Top view of Alfa Mirage GKS-300 density scale with water tank and weighing tray.
Alfa Mirage GKS-300 showing 22K gold purity result on its digital blue display.
High-precision Alfa Mirage GKS-300 analyzer for gold and platinum verification.
Calibrating the Alfa Mirage GKS-300 gold tester with a standard metal weight.
Complete GKS-300 kit: scale, tank, tweezers, thermometer, adapter, and weights.
Alfa MirageSKU: TTIA0024

Alfa Mirage Precious Metal Tester GKS-300

$1,755.78 /
Shipping calculated at checkout.
Alfa Mirage GKS-300 precious metal tester weighing a gold chain and jewelry.
Alfa Mirage Precious Metal Tester GKS-300
$1,755.78 /
Low Stock (5)

Brand Name: Alfa Mirage

Place of Origin: Japan

Material: Plastic

item code: TTIA0024

Model: GKS-300

Application: Gold, White gold, Platinum

Measuring Range: 0.001 – 300 g (0.001 g/㎤)

Minimum sample weight: 2 g

Display: Gold : Lo, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24K

PT: Lo, Pt600, 650, 700, 750, 800, 850, 900, 950, 1000

Purity 99.9%

Density (specific gravity)

Weight / Dimensions: 2.8 kg / 260 x 190 x 200 mm

Power: AC100 – 240V

 
 
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See right through the most deceptive fakes. Did you know that advanced counterfeiters often coat cheap metals (like lead or copper) in a thick layer of real gold? Standard electronic pens and testing acids only scratch the surface, allowing these "deep fakes" to pass as authentic. The Alfa Mirage GKS-300 uses the foolproof science of water density (hydrostatic weighing) to instantly calculate the true purity of your gold and platinum all the way to the core. Engineered in Japan, it is the ultimate desktop truth-teller for jewelry collectors and precious metal investors.

Why You’ll Love It

  • Defeats Heavy Plating: Because it measures the overall density of the object, it immediately exposes items that are plated in real gold on the outside but filled with worthless metal on the inside.

  • Verify the Manufacturer's Stamp: Never take a "14K" stamp at face value again. The digital display instantly reveals the true karat (from K9 to K24) and Platinum purity (600-1000 & %), letting you know if a piece is under-karated.

  • Scrap Gold Averaging: Have a pile of broken chains and rings? You can place a small batch of scrap gold into the water tank to get an instant average purity reading for the entire pile.

  • Everyday Precision Scale: When you aren't hunting for fakes, this compact machine doubles as a highly accurate, standard digital gram scale and a general densimeter for your other weighing needs.

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).

Coin & Small Bullion Investors: The absolute best way to verify that your solid gold coins or small bullion bars haven't been drilled or filled with cheaper metals, all without scratching or cutting them.

Thrifters & Estate Sale Buyers: Sort through tangles of vintage jewelry to quickly evaluate the true karat and value of solid pieces before you flip them.

The Smart Home Appraiser: Gives you laboratory-grade confidence on your desktop, ensuring that the heavy, solid gold chain you just bought online is exactly what the seller promised.

Free Global Shipping
We process orders within 1-3 business days. Estimated standard international delivery is 6-12 business days.

14-Day Returns
We have a 14-day return policy. Items must be unused, with all original accessories, and in original packaging.

For full details, please refer to our Shipping and Refund policies at the bottom of the page.


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Your long-term partner in jewelry making. We test and source the best global tools, so you can focus on creating.

Email: sales@luxgoldtools.com

Head Office: Room 1101, 11/F, Yuntong Commercial Building, 46-48 Hillwood Road, Tsim Sha Tsui, Hong Kong

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