How to Test Gold Purity
Start with simple checks, confirm with professional testing.
To tell if gold is real, first check hallmark stamps and run quick non-destructive checks like a magnet test. For reliable purity confirmation, use acid or XRF testing through a jeweler.
Step-by-step testing workflow
1) Hallmark and visual inspection
Look for stamps such as 375, 585, 750, 875, 916, or 999. Check consistency in color and wear points.
2) Magnet screening
Strong magnetic pull usually indicates base-metal content. Use this as a red-flag check only.
3) Density and weight sanity check
Gold is dense. Pieces that feel unexpectedly light for their size can be plated or hollow.
4) Professional confirmation
Ask for acid test or XRF scan at a reputable jeweler for a definitive purity result.
Common testing mistakes
- Relying on only one method (especially only magnet or color).
- Assuming all stamped items are genuine without seller verification.
- Ignoring mixed-metal components (clasps, springs, solder joints).
- Using aggressive chemicals without experience.
Frequently asked questions
How can I test gold at home?
You can do a basic visual check, hallmark check, and magnet check at home. These are screening steps only. For accurate purity, use an acid test or XRF test at a jeweler.
Does real gold stick to a magnet?
Gold itself is not magnetic, so strong attraction is a red flag. However, some clasps or mixed components can be magnetic, so this test alone is not conclusive.
What is the most accurate gold test?
XRF testing is fast and non-destructive and is one of the most accurate methods used by jewelers. Acid testing is also common and reliable when performed correctly.