HOW WE TEST GOLD | OAKTON COINS – XRF, ACID, MAGNET & MORE

By INFORMATIONAL

How We Test Gold at Oakton Coins

When you bring gold jewelry, coins, or bullion to Oakton Coins & Collectibles, we make the process clear, transparent, and accurate. Our team uses multiple methods to confirm authenticity and purity before making you an offer.

X-Ray Fluorescence (XRF)

We use a state-of-the-art XRF analyzer that scans the surface of your item with harmless X-rays. The machine instantly reads the alloy composition, showing exact percentages of gold, silver, copper, platinum, and other metals. One big advantage is that XRF can also detect toxic or undesirable metals sometimes mixed into gold, such as lead, cadmium, or nickel. These elements can lower the value of the item and, in some cases, pose health risks if worn. With XRF, you see a complete, accurate breakdown — right on the screen — without damaging your piece.

Acid Testing

For centuries, jewelers have used acids to test gold. We apply a small drop of nitric or hydrochloric acid solution to a mark made on a testing stone. Each acid corresponds to a specific karat (10k, 14k, 18k, 22k). If the mark dissolves, the gold is lower than that karat; if it remains, the item is confirmed at that purity or higher. Acid testing is a highly reliable way to verify gold content.

Magnet Check

Pure gold and most gold alloys are not magnetic. A quick pass with a strong magnet can instantly rule out certain fakes. While not a stand-alone test, it’s a fast way to spot plated or base-metal items.

Other Verification Methods

  • Density test – Gold is unusually heavy for its size. Comparing weight versus volume can detect unusual alloys.

  • Electronic testers – Conductivity meters provide another non-invasive way to check gold purity.

  • Expert inspection – Our team looks at hallmarks, craftsmanship, and wear patterns to identify authenticity or plating.

Why Testing Matters

Gold testing ensures you get a fair and accurate offer. By combining modern technology with time-tested methods, Oakton Coins guarantees every piece is carefully evaluated. You’ll see the results right in front of you, and receive immediate payment if you decide to sell.

Visit our Skokie shop today to have your gold tested and appraised. We proudly serve the Skokie, Evanston, and Chicago North Side communities with honesty, safety, and expertise.

Frequently Asked Questions About Gold Testing

Does XRF damage my gold?
No. X-ray fluorescence is completely non-invasive and leaves no marks or residue. It simply scans the surface and instantly provides a readout of the metals present.

Is acid testing safe for my jewelry?
Yes. The acid is applied only to a small scratch made on a test stone, not directly to your jewelry. Your piece will not be harmed. This is a time-tested and reliable method used by jewelers for centuries.

Why use more than one test?
Each test has its strengths. XRF gives a full metal breakdown, acids confirm karat levels, and magnets or density checks quickly rule out counterfeits. Together, they ensure accuracy and transparency.

Can gold contain toxic metals?
Unfortunately, yes. Some jewelry and coins have been alloyed with metals like lead, cadmium, or nickel. XRF can detect these instantly, so you’ll know exactly what’s in your piece.

Do you test silver, platinum, and other metals too?
Absolutely. Our equipment and expertise extend to silver, platinum, palladium, and many other precious metals.

Do I need an appointment for testing?
No appointment is necessary. Simply stop by our Skokie shop during business hours and we’ll test your items on the spot.