How to Spot the Difference Between Fine Jewelry and Costume Jewelry

Not all jewelry is created equal. Some pieces are carefully crafted from precious metals and gemstones, while others are designed to look beautiful without holding lasting value. Knowing the difference between fine jewelry and costume jewelry is important, especially if you are thinking about selling your collection.

Many people discover that what they thought was “just a pretty necklace” is actually worth far more than expected, while others are surprised to learn a piece has little resale value. If you have ever wondered how to tell if jewelry is real, here are some simple tips.

What Is Fine Jewelry?

Fine jewelry is made from high-quality, durable materials such as gold, platinum, or sterling silver. It often features genuine gemstones like diamonds, sapphires, or emeralds. These pieces are designed to last for generations.

What Is Costume Jewelry?

Costume jewelry, sometimes called fashion jewelry, is made from less expensive base metals such as brass, copper, or alloy. Stones are typically glass, plastic, or synthetic imitations. While these pieces can be fun, stylish, and even collectible, they usually do not have significant resale value.

Real vs. Fake Jewelry Tips

If you are trying to decide between fine jewelry vs costume jewelry, these are some signs to look for:

• Hallmarks and Stamps
  Check for marks inside rings or on clasps. Real gold is usually marked 10K, 14K, or 18K. Sterling silver may be stamped “925.” Costume jewelry often has no markings or may be labeled as “plated.”
  
  

• Weight and Feel
  Fine jewelry tends to feel heavier because of the density of precious metals. Costume jewelry often feels lighter or hollow.
  
  

• Gemstone Quality
  Real gemstones sparkle differently than glass or plastic. A simple test: breathe on the stone. A real diamond will clear quickly, while glass will fog for a few seconds.
  
  

• Wear and Tarnish
  Solid gold and platinum do not tarnish the way base metals do. If you see flaking, discoloration, or a different metal showing through, it is likely costume jewelry.
  
  

• Magnet Test
  Precious metals are not magnetic. If a piece is attracted to a magnet, it is most likely not fine jewelry.
  
  

Why It Matters When Selling

Understanding what you own is important if you are considering selling. Fine jewelry is more likely to bring a cash offer, especially at a buying event where professional buyers evaluate the craftsmanship, materials, and market demand. If you are unsure, it is always worth bringing in both fine and costume pieces. Sometimes what you think is costume jewelry may actually be something valuable.

If you are sorting through inherited pieces or deciding what to sell, knowing the difference between fine jewelry and costume jewelry can give you confidence. For a professional evaluation, visit a National Rarities buying event. Our experts are happy to review your collection and let you know what holds real value.