That sparkly bowl at the thrift store: is it fine cut crystal or pressed glass made to look like it? Both have their place in a collection, but they're very different things. Here's how to tell.

We have six pieces of vintage pressed glass in the shop right now, including a boxed set of F.B. Rogers shakers with a cut-glass style pattern for $28. Each one is the only one we have.
See the pressed glass →
How each is made
Pressed glass is made by pressing molten glass into a patterned mold. It became affordable and popular in the 1800s and gave us everything from EAPG (Early American Pressed Glass) to Depression glass and carnival glass. Cut glass and crystal start as a plain blank, and the pattern is ground into it by hand with cutting wheels, then polished. "Crystal" traditionally means glass with lead in it, which makes it heavier, clearer and more brilliant.
Test 1: Feel the edges
Run a finger over the pattern. Cut glass has sharp, crisp edges where the wheel cut in. Pressed glass feels rounded and soft, because the glass flowed into the mold.
Test 2: Look for mold seams
Pressed glass often has faint raised lines where the mold pieces met. Turn the piece in the light and look along the sides. Cut glass has no mold seams.
Test 3: Tap it
Gently flick the rim of a bowl or glass with a fingernail. Lead crystal tends to ring with a clear, lingering tone. Ordinary glass gives a short, dull clink. Shape and thickness affect this too, so use it with the other tests.
Test 4: Weight and clarity
Lead crystal is heavier than you'd expect and very clear, and it throws rainbows in sunlight. Pressed glass is lighter and can look slightly gray or wavy.
Test 5: Look at the pattern
Hand cutting has tiny irregularities. Pressed patterns are perfectly repeated and sometimes have a stippled background meant to imitate sparkle.
Value: does pressed mean cheap?
Not at all. Rare pressed patterns, colored glass and early pieces can be very collectible. Pressed glass is honest glass. The trouble only starts when it's sold as cut crystal.
See it in person: pressed glass in the shop
Molded patterns, from cut-glass lookalikes to colored and iridescent glass. Each one is a single piece, so when it's gone, it's gone.
Care
Hand wash both kinds in warm, not hot, water. Sudden temperature changes can crack old glass, and dishwashers can leave cloudy etching that never comes out.
Keep reading
See our guides to milk glass and Sommerso glass, or browse our Collectable Glass collection.
Keep browsing:
Collectable glass →Vintage kitchen & dining →Vintage home decor →
Keep reading: What Is Carnival Glass? · What Is Slag Glass? · Vintage Apothecary and Bitters Bottles
Have you ever brought home a "crystal" bowl and found mold seams on it? Tell us what you found and how you figured it out.





