Gold and brass are shiny yellow metals. People who have no experience with metals will have a hard time distinguishing the two. Fortunately, there are several ways to tell the difference between gold and brass. If you know what to look for, the metal usually has markings to help identify it. You can also test the physical and chemical properties of gold and metals.
Step
Method 1 of 3: Monitoring Physical Properties
Step 1. Pay attention to the color
Although gold and brass are similar in color, gold metal is more lustrous and yellow than brass. Brass metal is duller and does not have the yellow color of pure gold. However, when gold is mixed with other metals, this method becomes less reliable.
Step 2. Scrape the metal across the ceramic surface
Gold is a very soft metal. When rubbed on the ceramic, gold will leave a golden mark. On the other hand, brass is harder and will leave black marks on the surface. Simply press the metal against the ceramic and drag along its surface.
Step 3. Metal density test
The most accurate way to measure the density of a metal is to measure its volume and mass, and then calculate the density. Fortunately, there is a quicker and easier way. Throw the metal lightly with your hands, and let it drop (or, you can also lift the metal and lower it slowly without leaving your hand). Because gold is denser than brass, it's heavier than you might expect. Brass will feel lighter because of its lower density.
Method 2 of 3: Identifying Commercial Differences
Step 1. Look for metal rust
Carat is the unit for measuring the purity of gold. The higher the ratio of gold to other metals in an object, the higher the karat. Pure gold has 24 carats. Brass metal will not be assigned a carat unit. Usually, rust is listed in an inconspicuous place, such as the bottom or inside of an object, although sometimes it may be elsewhere.
Step 2. Look for the word “Brass”
Although brass does not have rust, it is sometimes marked. Many brasses have the word “brass” (brass) somewhere in the metal. This kata is sometimes stamped or engraved into the metal scrap when it is forged. Like rust, the location of these marks can vary, but they are usually on the inside of the lip or bottom of an object.
Step 3. Know the price of the metal
If you know the selling price of the metal, you can easily tell the difference between gold and brass. Gold has a high price, depending on its purity. Brass is quite cheap compared to precious metals like gold and silver.
Method 3 of 3: Testing the Chemical Properties of Metals
Step 1. Scan the stained area
One of the most revered properties of gold is that it is immaculate. On the other hand, brass reacts with oxygen in the air. This reaction is called oxidation and will make brass appear stained and discolored. If there is an oxidized area, it means the metal is brass. However, the metal is not necessarily gold even if there is no trace of oxidation.
Step 2. Test in an inconspicuous area
When testing the chemical properties of metals, it is best to do so in an inconspicuous area. This ensures that the metal is not damaged by the test. We recommend choosing the lip or tongue of an object that has a bottom side, or a metal part that is closed or hidden.
Step 3. Apply acid to the metal
Apply concentrated acid to the metal. Brass will react with acids, unlike gold. If you see bubbles or discoloration when the metal hits the acid, it means the metal is brass. If nothing changes, your metal is gold.
Warning
- Acids are very corrosive and acidic.
- Applying acid to metal can lower the price of the metal.
