Antique identifier, scanner and value checker
Photograph any antique. Get instant period attribution, maker identification, construction analysis, auction-based values, and reproduction detection.
Period attribution and maker identification
Every antique tells its age through construction, material, and design.
An antique is a conversation between craft traditions and time. The way a drawer is jointed, the species of wood chosen for the carcass, the type of finish applied, and the decorative vocabulary all encode the piece's origin story. Curiosa reads these material signatures - dovetail geometry, hardware patina, surface tooling, and stylistic motifs - to place your object within a specific period, region, and often a known workshop tradition. The result includes auction-based market valuation drawn from what comparable pieces have actually sold for. For clear photographs, check our scan tips.
Construction as a time capsule
Before 1860, furniture joints were cut by hand - each dovetail slightly different in size and spacing, with visible scribe lines where the joiner marked his cuts. Machine-cut dovetails (appearing from the 1860s) are precisely uniform. Hand-planed surfaces show subtle undulations visible in raking light, while machine-planed surfaces are perfectly flat. Nail technology evolved predictably: hand-forged nails (irregular, with visible hammer marks) predate 1790; cut nails (rectangular shaft) dominated 1790-1890; wire nails (round shaft) appeared from 1890. These construction details create a reliable dating framework. Explore identified antiques in our antiques archive.
Maker marks, labels, and stamps
A label reading "Herter Brothers, New York" on the underside of a table transforms a handsome piece of aesthetic movement furniture into a documented work by one of America's most important 19th-century cabinetmakers. Curiosa identifies maker's marks on ceramics (base stamps), silver (hallmarks), furniture (paper labels, branded marks, chalk marks), and decorative objects (foundry marks, cast signatures). Even partial marks can be matched against databases of known makers. Learn more about how the identification process works.
Regional style traditions
American furniture differs markedly from English, French, and German traditions. American Colonial and Federal pieces tend toward simpler lines with regional woods (cherry in Connecticut, walnut in Pennsylvania, mahogany in coastal cities). English Georgian furniture features heavier proportions and imported mahogany. French pieces emphasize curvature, ormolu mounts, and marquetry. German Biedermeier uses blonde fruitwoods with severe geometric forms. Curiosa uses these regional signatures alongside construction analysis to narrow attribution. The same style-based approach helps identify paintings and sculptures from specific periods and schools.
Auction-based antique values
What antiques actually sell for - not what dealers hope to get.
The antiques market has undergone significant repricing since 2000. Formal 18th-century furniture ("brown furniture") that once brought $50,000-$100,000 at auction now often sells for $5,000-$15,000. Meanwhile, mid-century modern pieces have appreciated dramatically, and Chinese export porcelain has surged. Curiosa references current completed auction results rather than outdated price guides, so valuations reflect today's market - not the market of twenty years ago. See our pricing plans for full access.
How Curiosa compares to traditional appraisal
| Factor | Curiosa | Antique dealer | Auction house |
|---|---|---|---|
| Speed | 10-15 seconds | Appointment needed | Weeks for formal estimate |
| Cost | Included in scan | Often free (with purchase motive) | Free estimate (commission on sale) |
| Price basis | Completed auctions | Retail markup (2-3x) | Conservative estimates |
| Physical inspection | Photo-based only | Hands-on examination | Specialist examination |
| Reproduction detection | Construction analysis | Experience-based | Expert cataloging |
Patina, restoration, and structural integrity
Reading the story that age and use have written on every surface.
Antique condition exists on a spectrum from "untouched survivor" to "professionally restored" to "over-restored." Each position carries different market implications. A piece with original surface - genuine patina, age-appropriate wear, original hardware - typically commands a premium over a perfectly restored example. The market values authenticity of surface as much as authenticity of form. For optimal photographs showing surface detail, use our photo guide.
Understanding patina
Genuine patina develops over decades of exposure to light, air, and human contact. On wood, it appears as a deepening of color and a smooth, waxed surface built up from years of polishing. On brass and bronze, it manifests as a darkened, mellow surface that artificial aging cannot replicate convincingly. On silver, it's a soft, warm tone distinct from the harsh black of chemical patination. Curiosa distinguishes natural patina from artificial aging by analyzing wear consistency - real wear accumulates logically at points of contact, while artificial distressing is random.
Restoration versus conservation
Conservation preserves what exists: stabilizing loose joints, consolidating flaking finish, cleaning carefully. Restoration replaces what's lost: new veneer patches, replacement hardware, re-finishing. Over-restoration removes originality: stripping original finish, replacing patina with new lacquer, substituting period hardware with reproductions. Curiosa identifies visible restoration through finish discontinuities, hardware style mismatches, and wood color variations that suggest replaced components.
Reproduction detection and age verification
Separating genuine antiques from later copies and marriages.
The reproduction spectrum
Reproductions range from honest copies (clearly labeled as such) to deliberate fakes made to deceive. High-quality Victorian reproductions of 18th-century furniture can themselves be over 100 years old, adding confusion. Curiosa evaluates construction method, hardware type, wood species, finish chemistry indicators, and wear patterns to assess whether an object is consistent with its claimed age. For more on AI authenticity checks, see our fake detection guide.
Physical checks AI cannot perform
- Blacklight (UV) examination: Reveals repairs, repainting, and finish differences invisible under normal light.
- Weight and density: Genuine old-growth mahogany is significantly denser than modern plantation-grown timber.
- Interior examination: Drawer bottoms, back boards, and hidden surfaces reveal construction age through saw marks, wood shrinkage, and oxidation.
Frequently asked questions
Detailed answers for antique collectors and enthusiasts.
How does AI identify an antique's period and origin?
Curiosa analyzes construction techniques, decorative motifs, material characteristics, and stylistic conventions visible in your photos. A hand-cut dovetail joint (irregular spacing, scribed lines) places furniture before approximately 1860, while machine-cut dovetails (uniform, precise) indicate later production. Design motifs narrow the attribution further: acanthus leaf carving suggests neoclassical influence, while Gothic arches and tracery point to the Gothic Revival period. Combined with maker's marks, labels, or stamps when visible, Curiosa triangulates period, region, and often the specific workshop or manufacturer.
How can I tell a reproduction from an original antique?
Reproductions lack the accumulated evidence of age: genuine patina (decades of handling, exposure, and oxidation), consistent wear patterns (drawer runners worn smooth, foot pads flattened, handles with skin-oil darkening), and period-appropriate construction (hand-forged nails, irregular saw marks, appropriate wood shrinkage). Modern reproductions may have artificially distressed surfaces (random rather than logical wear patterns), machine-made components, and modern finishes. Curiosa evaluates these markers to assess age consistency - though the most sophisticated reproductions may require physical examination of wood, hardware, and finish chemistry.
What is a 'marriage' in antiques?
A marriage combines parts from different pieces - a genuine 18th-century top placed on a later base, or a period drawer front fitted into a new carcase. Marriages are legitimate in the trade when disclosed, but deceptive when sold as entirely original. Telltale signs include mismatched wood species or grain between top and base, different patina colors, filled or plugged holes from removed hardware, and construction technique differences between components. Curiosa flags style and construction inconsistencies between parts that suggest a marriage.
How does Curiosa value antiques compared to auction houses?
Curiosa references completed auction results - what items actually sold for - rather than estimates or reserve prices. Auction houses provide pre-sale estimates that are often conservative to attract bidders. A Georgian mahogany chest might carry an estimate of $2,000-$3,000 but sell for $5,500 if two motivated buyers compete. Conversely, items with unrealistic reserves frequently fail to sell. Curiosa's ranges reflect actual hammer prices plus buyer's premium, providing a more realistic market picture than either dealer asking prices or auction estimates.
Does age automatically make something valuable?
No. Age is necessary but insufficient for value. A mass-produced Victorian washstand from 1880 might sell for $100-$300, while a well-documented Arts & Crafts piece from 1905 by Gustav Stickley could bring $5,000-$50,000. Value depends on maker attribution, quality of materials and craftsmanship, rarity of form or decoration, condition, provenance, and current market demand. The 'brown furniture' market (generic Georgian-Victorian mahogany and walnut pieces) has declined significantly since 2000, while mid-century modern design has surged. Curiosa contextualizes your antique within current market conditions.
What construction details indicate quality in furniture?
High-quality antique furniture reveals itself through construction: hand-cut dovetails (irregular, with scribed lines), mortise-and-tenon joints (strong, time-consuming), hand-planed surfaces (slight rippling visible in raking light), solid wood construction (vs. veneered plywood in later pieces), and secondary woods appropriate to the region (pine or poplar for American pieces, oak for English). Hardware quality matters too: hand-cast brass pulls, hand-forged iron hinges, and wooden knobs turned on a lathe all indicate period craftsmanship. Machine-made components, Phillips-head screws, or plywood backing boards are indicators of later production or restoration.
How do I identify marks on pottery and porcelain?
Ceramic marks are typically found on the base and may include factory marks (Meissen crossed swords, Wedgwood impressed name, Royal Copenhagen waves), painter's marks, pattern numbers, and date codes. Mark styles evolved over time - Meissen's crossed swords have changed shape across 300 years, providing dating clues. Curiosa identifies factory marks from photographs and cross-references them with known mark evolutions. Beware: marks were widely copied, and many 19th-century factories produced pieces with deliberately confusing marks similar to prestigious competitors.
What are the most collectible antique categories in 2026?
Mid-century modern design (1945-1975) continues its strong trajectory - original Eames, Wegner, and Jacobsen pieces command premium prices. Chinese art and antiques remain robust, particularly Imperial porcelain and jade. Early American furniture by documented makers (Townsend-Goddard, the Dunlaps) holds strong. Decorative arts by Tiffany Studios, Lalique, and Gallé have consistent collector bases. Meanwhile, formal English and Continental furniture ('brown furniture') has declined in value, creating buying opportunities for those with space and taste for these now-unfashionable but beautifully made pieces.
Related resources
Antiques archive
Browse all scanned antiques with rarity scores.
Learn moreHow rarity works
Understand rarity scoring across all categories.
Learn moreHow Curiosa works
The technology behind identification and valuation.
Learn morePricing
Free scans, premium plans, and scan packs.
Learn moreFake detection
How AI spots fakes across collectible categories.
Learn moreIs it real?
Quick authenticity checks for antiques and collectibles.
Learn moreScan tips
Capture better photos for more accurate results.
Learn moreIdentify and value your antique
From period attribution to auction value in one scan.