Art Deco vs Art Nouveau: How to Tell Them Apart and Price Them for Resale

Art Deco vs Art Nouveau: Tools That Identify and Price Each

Art Nouveau (about 1890 to 1910) uses curves, flowers and flowing lines, while Art Deco (about 1920 to 1940) uses geometry, symmetry and bold materials like chrome and Bakelite. To price either style, identify it from a photo, then check what similar pieces actually sold for instead of what sellers are asking. I built Underpriced AI, so weigh my comparison with that in mind.

I did not confirm any curio.app fact on its own page or App Store listing, so I left those cells honest instead of guessing. Check the vendor's page before you rely on it.

curio.app

Curio ranks for "art deco vs art nouveau" today. Its site says you snap a photo to identify antiques and collectibles and it prices from online listings for comparable pieces, without saying whether those are sold or asking prices. It is free to download on iOS and Android; the subscription price is not stated on its home page (checked 2026-11-06). For a piece you mean to sell, open the sold listings behind any number before you trust it.

Here is what to check when you open it. Does it show sold prices or only asking prices? Can you click through to the listings behind a number? Does it work from a photo at all, or is it a reference page about the styles? A style explainer helps you name a piece. It does not tell you what the piece will sell for.

If you only want to learn the difference between the styles, an explainer is enough. If you have a lamp or vase to list this week, you need sold comps.

Underpriced AI

Underpriced AI scans an item with your phone camera, identifies it, and shows the sold listings behind its price. Those listings come from more than one marketplace, and you can open each one. For a Deco or Nouveau piece, that matters because condition, maker and marks swing the price a lot, and you can check each comp against your own piece.

It falls short in the places any photo tool does. An unmarked piece, or a later reproduction in the style, can get matched to the wrong comps. I treat the style label as a starting point and read the comps myself. You also get one free scan per new account, so test it on your best piece. After that, scans are paid.

It fits resellers with a box of mixed pieces from an estate sale. The workflow is scan, value, then list, and you can cross-list to eBay, Poshmark and Mercari from the same screen. It fits less well if you want a long history lesson on the movements. For broader context on photo-pricing tools, see AI reselling tools that price items from a photo and Google Lens vs Underpriced AI.

Telling the two styles apart before you scan

Name the style yourself first, so you can catch a bad match. Art Nouveau pieces show whiplash curves, dragonflies, lilies, women with flowing hair and asymmetry. Think Tiffany Studios lamps, Gallé glass and Mucha-style prints. Art Deco pieces show zigzags, sunbursts, stepped forms, fans and strict symmetry. Think chrome cocktail shakers, Bakelite jewelry and Lalique-style frosted glass.

In my experience, the costly mistake is trusting a style word in a listing title. Sellers tag anything curvy as "Nouveau" and anything angular as "Deco." Signed pieces from the big names tend to sell for far more than unsigned ones, and they are also the most copied. Always look for a mark on the base.

How to test any of them on one item in five minutes

Pick one piece with a visible maker's mark or a clear shape, then run the same test on each tool.

1. Photograph the piece in good light, plus a close shot of the base or back.
2. Decide the style yourself using the cues above, and write down your guess.
3. Run the photo through the tool and see whether its identification matches yours.
4. Open at least three of the comps it shows. Confirm each one is a sold listing, not an asking price, and that the maker, size and condition match your piece.
5. Search the same piece yourself on eBay with the sold filter. If your range and the tool's range are close, trust it. If it cannot show you any comps, treat the number as a guess.

For a wider look at the photo-to-price habit, see what is this worth, from one photo.

Common Questions

What is the main difference between Art Deco and Art Nouveau?

Art Nouveau (about 1890 to 1910) is organic, with curving lines, flowers, insects and flowing female figures. Art Deco (about 1920 to 1940) is geometric, with symmetry, zigzags, sunbursts and materials like chrome, Bakelite and glass. Nouveau looks like it grew, and Deco looks like it was machined.

Which sells for more, Art Deco or Art Nouveau?

Neither style wins on its own. Maker, marks, condition and material set the price, so a signed Gallé or Tiffany Studios piece will outsell an unmarked Deco lamp, and a signed Deco piece will outsell a generic Nouveau-style vase. Check sold listings for your exact piece instead of pricing by style.

How can I price an Art Deco or Art Nouveau piece from a photo?

Photograph the piece and any maker's mark, then use a tool that shows sold listings, not asking prices. Open several comps and confirm they match your piece's maker, size and condition. Underpriced AI gives every new account one free scan, so you can test it on one piece before you decide.