How to Identify Depression Glass

Learn how to identify authentic depression glass using visual characteristics, maker marks, and expert tips. Based on 44 depression glass items in the InstAppraisal archive.

🔍Key Identification Characteristics

Visual and physical traits that help identify authentic depression glass

1 Machine-pressed glass with visible mold seams running through the pattern
2 Common colors: pink, green, amber, crystal (clear), cobalt blue, yellow (topaz)
3 Lightweight, thin-walled glass with slightly wavy or uneven surfaces
4 Pattern is molded into the glass (raised or intaglio), not cut or etched
5 Minor imperfections: small bubbles, straw marks, and slight color variation within a batch
6 Smooth, fire-polished rims (not ground or polished after molding)

🔎Common Marks & Labels

Stamps, signatures, and labels to look for on depression glass

Most Depression glass is unmarked — identification is by pattern and color, not marks
Some makers used mold marks: anchor (Hocking), "F" in a triangle (Hazel-Atlas), "M" in a circle (MacBeth-Evans)
Federal Glass used an "F" inside a shield
Indiana Glass pieces sometimes have a diamond mark
Jeannette Glass: "J" in a triangle on some pieces

💡Expert Tips

Tip 1

Buy a Depression glass pattern guide (such as Gene Florence's reference books) and learn the top 20 patterns: American Sweetheart, Cameo, Cherry Blossom, Mayfair, Royal Lace, and Miss America are consistently the most valuable

Tip 2

Color is the biggest value driver after pattern: cobalt blue, red (Royal Ruby), and tangerine are significantly more valuable than common pink or green in the same pattern

Tip 3

Check rims and edges carefully: Depression glass is soft and chips easily. Even small rim chips reduce value dramatically. Use your finger to feel for rough spots