- Naaz Sharma
- Aug 25, 2025
- 2 min read
When it comes to selling your old gold and silver, the most important factor that decides the value is purity. Unfortunately, many sellers don’t know how to check purity properly and end up accepting whatever a local jeweler tells them. This often leads to undervaluation and loss of money.
To avoid this, you must be aware of the correct methods to check the purity of your precious metals before selling. Let’s break it down for both cash for gold and Cash for Silver.
Checking the Purity of Gold
Gold is measured in karats (K), with 24K being the purest form. But jewelry is usually made in 22K, 18K, or 14K to give it strength. Here’s how you can check its purity:
1. Hallmark Certification
The simplest way is to look for a BIS Hallmark (in India).
Hallmarked jewelry carries details like karat value, jeweler’s identification mark, and year of hallmarking.
2. Magnet Test
Pure gold is non-magnetic. If your jewelry sticks to a magnet, it may have impurities or alloy content.
3. Acid Test
Jewelers use nitric acid to check purity. Different reactions reveal how pure the gold is.
This is accurate but slightly risky if not handled properly.
4. Carat Meter / XRF Machine
Modern gold buyers use carat meters or X-Ray Fluorescence (XRF) machines.
It is the most reliable, non-destructive method that gives instant purity results.
Checking the Purity of Silver
Silver is usually measured in percentage of purity. Pure silver is 99.9%, while sterling silver is 92.5%. Here’s how you can check it:
1. Hallmark / Stamp
Look for stamps like “999” (pure silver) or “925” (sterling silver) on jewelry, coins, or utensils.
2. Ice Test
Silver has high thermal conductivity. Place an ice cube on the silver piece—if it melts quickly, it’s a sign of high purity.
3. Magnet Test
Like gold, silver is not magnetic. If it sticks to a magnet, it may not be pure.
4. Sound Test
Tap silver with another metal—pure silver gives a long, high-pitched ringing sound, while fake ones sound dull.
5. Professional Purity Test
Trusted buyers use advanced XRF machines to check silver purity without damaging the item.
Why Purity Testing Is Important Before Selling?
To avoid being cheated or undervalued.
To ensure you get paid exactly for the true weight and purity.
To build confidence and trust in the selling process.
Final Thoughts
Whether you’re selling a gold necklace or silver utensils, knowing the purity is the first step to getting the best price. Always check for hallmark stamps, use simple tests at home, and finally, rely on professional carat meters or XRF machines for 100% accurate results.
Remember, a well-informed seller is always in a better position to negotiate. So, next time before selling your gold or silver, check its purity—and walk away with the right value for your precious metals.
