Antique glass encompasses an enormous range — from mass-produced Depression-era pieces worth a few dollars to signed art glass by Tiffany, Gallé, or Lalique worth tens of thousands. Color, pattern, maker's signature, and rarity all play crucial roles in valuation.
Typical Value Range
$5 – $100,000+
maker's signature, rarity, and color drive value dramatically
What to Look For
How to Identify Antique Glass Authenticity & Value
Maker's signature
Art glass by Tiffany (Favrile), Gallé, Daum Nancy, and Lalique is signed on the base. These signatures must be verified — fakes are common.
Pattern identification
Pressed glass patterns (Depression glass, EAPG) can be identified by the mold pattern. Reference books like Weatherman's guides list hundreds of patterns with values.
Color rarity
In Depression glass, rare colors (ice blue, alexandrite, tangerine) command significant premiums over common pink and green. Uranium glass glows under UV light.
Pontil marks
A rough pontil scar on bottle bases indicates hand-blown pre-1860 production. Smooth or machine-formed bases indicate later manufacture.
Bubbles and imperfections
Hand-blown glass contains irregular bubbles, slight thickness variations, and tool marks — signs of age and hand production.
Common Items
Popular Antique Glass Items We Identify
Depression glass pink plate
Tiffany Favrile vase
Gallé cameo glass
Lalique perfume bottle
EAPG pressed glass
Cobalt blue bottle
Milk glass covered dish
Carnival glass bowl
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FAQ
Frequently Asked Questions
Depression glass patterns are identified by the mold design pressed into the glass. Key patterns include Mayfair, American Sweetheart, Sharon, and Cameo. Color and manufacturer also matter — Anchor Hocking, Jeannette, and Federal Glass are the main makers.
Most Depression glass sells for $5–$50. Rare colors or rare patterns can reach $500+. Signed art glass by Tiffany, Gallé, or Lalique starts in the thousands.
Authentic Tiffany Favrile glass is signed 'L.C.T.' or 'L.C. Tiffany — Favrile' on the base, often with a number. The iridescent surface should have a distinctive oily sheen. Our AI can examine the signature and surface characteristics.