How To Test Gold At Home With Toothpaste

What is the easiest way to test gold?

How to Do the Float Test to Check If Gold is Real – Fill a cup or bowl with water and carefully drop your gold piece into it. If the gold is real, it will sink to the bottom of the cup. If it’s fake, it will float to the top or hover in the middle of the cup.

Does gold react to toothpaste?

Why Does This Test Work? – This test works because toothpaste contains a small number of abrasive particles. When you rub the toothpaste onto the gold, these particles work to remove a thin layer of the metal. The toothpaste will not affect real gold, but impure gold will change color.

The black streak that appears is due to the presence of other metals, like copper or silver. Keep in mind that this test will not work on gold-plated items. The toothpaste will remove the thin layer of gold, revealing the metal beneath. So if you’re testing a gold-plated item, check for the hallmark stamp first.

How to test gold for its purity. *And give it a value*

This stamp indicates that the item is made of real gold. Now that you know how to test gold with toothpaste, you can be sure that your gold jewelry is the real deal!

How can you tell if gold is real without a test kit?

The Ceramic Scratch Test – Take an unglazed ceramic plate or piece of tile and scrape a piece of gold across its surface. Real gold will leave a gold mark or trail. Other metals will leave a black trail.

Does gold react with baking soda?

Gold plated dishes or utensils – Never clean your gold-lined dishes or gold utensils with baking soda. Gold is an extremely soft metal and baking soda is an abrasive cleaner, says Franco. It will scratch ruin the finish and cause the plating to wear off. I’m friday/Shutterstock

Is vinegar gold test accurate?

Why Does Vinegar Work? – Vinegar is very destructive, so when you apply the vinegar to a fake piece of gold, the vinegar will cause the jewelry to tarnish. Gold is a non-reactive metal, so real pieces of gold will not react to vinegar.

Does real gold stick to magnets?

Can Gold Stick to a Magnet? – Pure gold on its own cannot stick to a magnet. However, if you have an alloy of gold, then it could stick to a magnet. An example of a gold alloy that may stick to a magnet is gold with over 20% of its atoms replaced by iron.

  • In very cold temperatures this alloy of gold may magnetize all on its own.
  • Will gold of different karats stick to a magnet? Gold jewelry, such as 18k gold, 14k gold, 10k gold, and even white gold can be magnetic depending on the alloys, or metals combined with gold, used.
  • If you think your gold coins or jewelry are pure gold, you can put them to the test by seeing if they are magnetic.
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If they stick to another metal, there’s a good chance your gold item isn’t pure gold. Instead, it may have iron or nickel inside of it. Keep in mind that although it isn’t magnetic, it still may not be pure gold. You may have a piece made of copper, lead, or aluminum with a gold coating.

How can I test gold without a gold tester?

Download Article Download Article Gold is a precious metal that comes in a variety of colors and different levels of fineness. The value of a piece of jewelry or another object will depend greatly on whether or not it is plated or pure gold. To identify the quality of a metal object, start by taking a close look at its surface.

  1. 1 Look for a hallmark. A piece of gold will usually be stamped with a mark indicating its type. A stamp of “GF” or “HGP” indicates that the piece is gold-plated, not pure gold. In contrast, a pure gold piece of jewelry may show a “24K” or other marking indicating fineness. Hallmarks are usually located inside the band of rings or near the clasp on necklaces.
    • However, be aware that some hallmarks can be faked, This is why it’s important to use a mark as only one of many indicators of authenticity.
    • The hallmark may be very small. You might even need a magnifying glass in order to see it clearly.
  2. 2 Look for fading around the edges of the piece. Turn on a bright light or lamp. Hold the piece close to the lamp’s light. Rotate it in your hand, so that you can examine all of the edges in particular. If you see that the gold appears faded or worn away at the edges, then it’s likely wear on the plating. This means that piece isn’t pure gold. Advertisement
  3. 3 Look for spotting on the piece’s surface. If you hold the piece under a bright light, do you notice white or red spots anywhere on it? The spots may be very tiny and difficult to see. That is why it’s important to examine the piece under a bright light and maybe with a magnifying glass. These spots indicate that the gold plating may be wearing away showing the metal underneath.
  4. 4 Place a magnet against the potential gold item. Hold a magnet directly above the piece. Lower the magnet until it is almost touches the surface of the item. If you feel as if the magnet is being drawn or pulled downward, then the item is not pure. The other metals in the item, such as nickel, are responding to the magnet. A pure gold piece will not draw the magnet, since non-ferrous.
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  1. 1 Apply some vinegar to the surface and look for a color change. Get a dropper and fill it up with white vinegar. Hold your metal object firmly in your hand or set it on a table. Place a few drops of vinegar onto the object. If the drops change the color of the metal, then it is not pure gold. If the color stays the same, then it is pure gold.
  2. 2 Rub your gold against a jeweler’s stone. Position a black jeweler’s stone on a table. Hold your gold piece firmly in your hand. Wipe it across the stone firmly enough to leave a mark. If the mark that you’ve left on the stone is solid and gold in color, then the piece is pure. If there is no line or only a faint one, then the piece is likely plated or not gold at all.
    • Be careful with this method as you run the risk of damaging your jewelry. You also have to use the right type of stone or the marks will be meaningless. You can get a jeweler’s stone through a jewelry supply store online or by talking with your local jeweler.
  3. 3 Rub your gold across a ceramic plate. Set an unglazed ceramic plate firmly on a countertop or table. Hold your gold item in your hand. Scrape the item against the plate. Watch to see if a streak or line of any type appears. A black line indicates that the item is not gold or is plated.
  4. 4 Test your gold against liquid foundation makeup. Coat the top of your hand with a thin layer of liquid foundation. Wait until the foundation is dry. Press your metal item against the foundation and rub. Authentic pure gold will leave a line in the makeup. If you do not see a line, then the object is plated or another metal.
  5. 5 Use an electronic gold tester. This is a small hand-held device with a probe at the end that you can buy online or through a jewelry supply store. To analyze a metal, you rub a conductive “tester” gel on to the metal item. This gel is usually available for purchase from the same places that sell testing devices.
    • Use the instructions that come with your tester to determine the exact results. Gold is a conductive metal, so a pure gold piece will have higher readings than a plated one.
  6. 6 Insert your gold into an XRF machine. This is a machine that many jewelers use to instantly determine the quality of a metal sample. Because of its cost this method may not be suitable for home use, unless you plan on using it regularly. To use an XRF scanner, place the piece of metal inside, activate the machine, and wait for the read out.
  7. 7 Take your gold to an assayer. If you keep getting mixed results or if you’d like to verify your finding, talk to your jeweler about getting another professional opinion. An assayer will perform a deep analysis of the content of the metal. This can be a costly option, so only use it if you believe your item may be worthwhile.
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  1. 1 Buy an acid testing kit for a more precise estimate of gold karat purity. You can purchase one of these kits through a jewelry tool supplier. The kit will contain all of the materials that you’ll need along with a set of detailed instructions. Make sure to read the instructions carefully before beginning and conduct an inventory of the supplies before starting.
    • These kits can be quite affordable, if ordered online. They start at around $30.
  2. 2 Inspect the needles for karat value labels. Your kit will contain a number of needles that you’ll use for testing different types of gold. Look for a karat value marking on the side of the needle. Each needle will also have a colored gold sample at the tip. Use the yellow needle for yellow gold and the white needle for white gold.
  3. 3 Make a notch with an engraving tool. Turn the piece around until you find a less noticeable spot. Hold an engraving tool firmly in your hand and make a small divot in the metal. The goal is to expose the deeper layers of the metal.
  4. 4 Put on protective gloves and goggles. Since you are working with acid, it’s important to don thick, but fitted, gloves. Eye protection is also a good idea, just to be extra cautious. Avoid touching your face or your eyes while working with the acid.
  5. 5 Place a drop of acid on the notch. Select the proper needle for the gold type. Then, hold the needle tip directly over the notch. Push the plunger of the needle down until a single drop of acid drops into the divot.
  6. 6 Read the results. Look closely at the divot that you made earlier and where you just applied the acid. The acid will react with the metal and may turn a particular color. Generally, if the acid turns a green color, this indicates that the piece is not pure metal, but instead gold plated or another metal entirely.
    • You can also do the nitric acid test. Nitric acid can help determine the presence of base metals in gold items. Apply a small amount of nitric acid to a discreet part of the item. Observe any color changes; if the acid causes the metal to turn green, it may indicate a lower gold content.
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Add New Question

Question How can you tell if something is gold without hallmark? Kennon Young is a Master Gemologist Appraiser and the Owner of Vermont Gemological Laboratory in Burlington, Vermont. With over 20 years of experience in the industry, Kennon and his team specialize in handmade engagement rings, wedding bands, and custom jewelry. Master Gemologist Appraiser Expert Answer It would be needed to test it in a scientific way – by acid testing, or electronic testing, or laser testing. Typically you’ll want to find a jewelry appraiser to do that for you. It costs money, but it is highly recommended if you are going to sell jewelry. It would be a poor financial decision to make assumptions on your own.

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Make sure to fully wipe down the gold between testing methods.


Use extreme caution when working with acid, as it can severely damage your skin upon contact.

Advertisement Article Summary X To test gold at home, check your gold for a hallmark, with “GF” or “HGP” meaning its gold plated, while “24K” or another number means its real gold. Alternatively, find out if your item is gold plated by holding the piece under a light to see if it’s fading at the edges.

What color does gold turn when it’s fake?

The Acid Test – All precious metals can be tested through the use of an acid test that will only harm fake materials. Genuine gold will stand up to your attempt to conduct a nitric acid test at home. Make a tiny mark on the piece of gold to penetrate the surface.

Is there an app to test gold?

Goldmeter – real gold detector on the App Store.

How can you tell the difference between gold and brass at home?

Color and Appearance – First, they’re both yellow metals. While brass is not bright yellow, it’s more dull than gold. However, gold is much shinier causing its golden color. Impurities can cause the shiny metallic luster that is characteristic of gold to fade. The purity of the gold determines the shine of ornaments. Making it hard to distinguish gold from brass if it has less than 12 Karats.

Can fake gold pass the magnet test?

How to Spot a Fake – What you need: a magnet and the piece of jewelry in question. What to do: Hold the magnet up to the gold. If it’s real gold it will not stick to the magnet. (Fun fact: Real gold is not magnetic.) Fake gold, on the other hand, will stick to the magnet. Brianna Steinhilber Brianna Steinhilber is an editor at NBC News BETTER.

Does gold stick to a magnet?

Can Gold Stick to a Magnet? Pure gold on its own cannot stick to a magnet. However, if you have an alloy of gold, then it could stick to a magnet. An example of a gold alloy that may stick to a magnet is gold with over 20% of its atoms replaced by iron.