: Use the "5 Cs" (cut, color, clarity, carat, and certification). Unique older cuts like "Old Mine" or "Asscher" can be highly collectible.
When purchasing, focus on authenticity and condition to ensure the piece retains its value.
: Look for small stamps (e.g., "14K," "PLAT," or designer logos like "Tiffany") on clasps or inside bands to verify metal purity and brand.
: Value often depends on the specific time period, such as Victorian, Art Deco, or Retro.
The Beginner's Guide to Collecting Vintage & Antique Jewellery