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Learn how to check gold purity, understand hallmarks, and verify authenticity. AURÉV’s guide helps you shop 18K gold jewelry with confidence.
by Stephanie Kim ・ 03 Sep 2023 ・5 min read
Gold has long been celebrated as a symbol of beauty and value, making its purity an essential factor when selecting jewelry. Whether you're choosing a piece for personal adornment or as an investment, understanding and verifying gold's authenticity is crucial. Follow this guide to help you make confident, informed choices for your collection.
Gold purity, measured in Karats (denoted as "K" or "KT"), signifies the proportion of gold in an alloy. Pure gold is 24 karat (24K), comprising 99.9% gold. Alloys like 18K, 14K, and 10K gold blend gold with other metals to enhance durability and alter appearance, each representing varying purity levels.
For further explanation of how each karat differs, refer to our guide on Gold Purity & Gold Colors: 24K, 18K, 14K & 10K Gold Explained.
Now that we've covered the basics, let's delve into how you can determine gold purity in the selection of your jewelry pieces!
A gold hallmark is a stamp or mark applied to gold jewelry to indicate various attributes, including purity, manufacturer's identity, and sometimes the country of origin.
It typically includes numeric values representing the karat purity (e.g., "18K" or "750" for 18 Karat gold) and symbols or letters denoting the manufacturer or country of origin. The hallmark serves as a guarantee of the gold's quality and authenticity, and it's a standard practice in the industry.
Purity markings on gold jewelry indicate the percentage of pure gold in the alloy, such as "18K" for 75% purity or "585" for 58.5%. These markings, often near the hallmark, provide essential information about the gold's composition.
Gold hallmarks and purity markings are usually engraved on the piece or attached with a tag. If you can't find them, ask your retailer for confirmation to ensure you're purchasing genuine solid gold. Extra proof will give you confidence in your purchase.
While hallmarks are most commonly associated with gold, sterling silver also carries specific stamps that indicate purity and authenticity. If you’re evaluating silver pieces, our Silver Hallmarks & Stamps: A Beginner’s Guide to Identifying Real Silver explains what to look for and how to read these markings correctly.
If you're comparing different gold types while evaluating purity, you may also find our breakdown of Gold Plated vs. Gold Filled vs. Vermeil vs. Solid Gold helpful for understanding how each one differs in durability and long-term value.
AURÉV Signature 18K Gold Pieces
Accurately determining gold purity requires expert testing with specialized equipment. Common professional methods include:
Because these methods require precision, it’s best to leave testing to professionals to avoid damage to your jewelry.
At AURÉV, we uphold the highest standards of quality, backed by certifications and authenticity guarantees. We work exclusively with trusted suppliers who provide XRF testing to verify the purity of 18K gold and ensure all pieces are free from nickel or brass.
We use only 18K solid gold and premium sterling silver for their durability, purity, and enduring elegance. Each piece bears hallmark and purity markings on clasps, earring backs, or ring interiors, reflecting AURÉV’s commitment to craftsmanship and luxury designed to last a lifetime.
