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Diamond Chairs by Harry Bertoia for Knoll, 1980s
By Harry Bertoia
Located in bruxelles, BE
Pair of armchairs in chromed metal and red fabric. Wear due to time and age of the armchairs.
Category

1980s Central American Mid-Century Modern Vintage Diamond Chair

Materials

Metal

Midcentury Original “Diamond” Chairs Harry Bertoia for Knoll Italy 1960s
By Harry Bertoia
Located in Palermo, IT
Pair of original chairs "Diamond" by Knoll International, 1960s. Wear consistent with age and use.
Category

1960s Italian Mid-Century Modern Vintage Diamond Chair

Materials

Steel

Pair of Harry Bertoia Wide Diamond Chairs in Chrome with covers
Located in St. Louis, MO
Pair of Chrome frame larger version Bertoia Diamond chairs with orignal covers, foam, chrome and
Category

1950s American Vintage Diamond Chair

Materials

Chrome

White Diamond Chair by Harry Bertoia for Knoll, 1960s
By Harry Bertoia, Knoll
Located in Leuven, Vlaams Gewest
A well known design classic designed by Harry Bertoia in the 1950s. This chair probably dates
Category

1960s German Mid-Century Modern Vintage Diamond Chair

Materials

Metal

Diamond Chairs in Oxblood Leather by Eero Saarinen for Knoll
By Knoll, Eero Saarinen
Located in Chicago, IL
c. 1970s. Price is for the set. Contact us if you’d like to purchase a single item. Reupholstered with thick foam in red oxblood leather.
Category

1970s American Mid-Century Modern Vintage Diamond Chair

Materials

Leather

Pair of China red lacquered “Diamond” chairs by Harry Bertoia, 1950
By Harry Bertoia, Knoll
Located in Roma, RM
Pair of China red lacquered “Diamond” chairs by Harry Bertoia. Production: Knoll, 1950s Dimensions
Category

1950s Vintage Diamond Chair

Materials

Metal

Matched pair of "Bertoia" Diamond Chairs, Classic Modern, Harry Bertoia for Knol
By Knoll, Harry Bertoia
Located in Buffalo, NY
Matching pair of Mid-Century Modern wire 'Diamond' chairs designed by Harry Bertoia manufactured by
Category

Mid-20th Century American Mid-Century Modern Vintage Diamond Chair

Materials

Metal

Diamond Chairs by Harry Bertoia for Knoll, 1980s Set 2
By Harry Bertoia
Located in bruxelles, BE
Pair of chromed metal armchairs. wear due to time and age of the armchairs.
Category

1980s Central American Mid-Century Modern Vintage Diamond Chair

Materials

Metal

Bertoia Large Diamond Chair by Harry Bertoia for Knoll
By Harry Bertoia, Knoll
Located in Toledo, OH
Bertoia large diamond chair by Harry Bertoia for Knoll. Harry Bertoia (1952) wire chairs are among
Category

Late 20th Century Vintage Diamond Chair

Materials

Chrome

Early Diamond Chair with Ottoman Designed by Harry Bertoia for Knoll
By Knoll, Harry Bertoia
Located in Palm Springs, CA
An early production Bertoia diamond lounge chair with the rubber shocks and the orignal orange
Category

1950s American Mid-Century Modern Vintage Diamond Chair

Mobitec "Diamond Style" Chair
Located in Brooklyn, NY
Stylish pair of upholstered lounge chairs in the style of Bertoia's "diamond" chair. Please confirm
Category

Late 20th Century Belgian Modern Vintage Diamond Chair

Materials

Upholstery

Diamond Chairs by Harry Bertoia for Knoll, 1970s, Set of 2
By Harry Bertoia, Knoll
Located in bruxelles, BE
Pair of white metal armchairs with black leather seat cover. Seat height : 42 cm .Wear due to time and age of the armchairs.
Category

1970s Central American Mid-Century Modern Vintage Diamond Chair

Materials

Metal

Vintage Mid-Century Modern Harry Bertoia for Knoll Diamond Chair w Blue Cover
By Harry Bertoia, Knoll
Located in Keego Harbor, MI
For your consideration is this vintage iconic Harry Bertoia for Knoll Diamond Wire Chair with the
Category

Mid-20th Century Mid-Century Modern Vintage Diamond Chair

Materials

Wire

Pair of Harry Bertoia for Knoll Diamond Chairs with Custom Leather Seat Pads
Located in Sacramento, CA
Pair of black mid-century modern diamond lounge chairs by Harry Bertoia for Knoll with custom-made
Category

Mid-20th Century American Mid-Century Modern Vintage Diamond Chair

Materials

Metal

Mid-Century Diamond Chair in Leather by Harry Bertoia for Knoll, USA, c. 1960s
By Harry Bertoia
Located in Deland, FL
Introducing a rare and limited "Diamond" chair designed by the influential Harry Bertoia for Knoll
Category

1960s American Mid-Century Modern Vintage Diamond Chair

Materials

Steel

Pair of Harry Bertoia Diamond White Chairs
By Harry Bertoia
Located in Pasadena, CA
A pair of Harry Bertoia diamond chairs finished in white powder coat over wrought iron by Harry
Category

Mid-20th Century French Mid-Century Modern Vintage Diamond Chair

Materials

Wrought Iron

Pair of Bertoia Diamond Chairs
By Harry Bertoia
Located in Brooklyn, NY
Mid-century modern iron chairs by Harry Bertoia in his classic diamond shape in white. Extremely
Category

1960s Mid-Century Modern Vintage Diamond Chair

Daimond Chair by René-Jean Caillette, French Design, 1958
By René-Jean Caillette
Located in Perpignan, FR
René-Jean Caillette Diamond chair Edition Steiner Elm veneered molded plywood, steel 31.5 x
Category

1950s French Vintage Diamond Chair

Materials

Plywood

Set of 3 Harry Bertoia Iron Garden Chairs
Located in Manhasset, NY
Set of 3 mid century iron garden "diamond" chairs by Harry Bertoia for Knoll, white painted on
Category

1950s American Vintage Diamond Chair

Materials

Iron

Harry Bertoia Wire Diamond Lounge Chair for Knoll
By Harry Bertoia
Located in Cincinnati, OH
Designed by sculptor Harry Bertoia the small diamond chair constructed by welding heavy metal wire
Category

Mid-20th Century American Vintage Diamond Chair

Set of 2 Diamond Leather Chairs by Harry Bertoia for Knoll, USA, c. 1960 s
By Harry Bertoia
Located in Deland, FL
Introducing a rare and limited set of "Diamond" chairs designed by the influential Harry Bertoia
Category

1960s American Mid-Century Modern Vintage Diamond Chair

Materials

Steel

Mid-Century Modern Original Vintage Knoll Bertoia Diamond Lounge Chair, 1960s
By Knoll
Located in Keego Harbor, MI
For your consideration is a Classic, diamond chair, by Knoll, circa 1960s. In very good vintage
Category

1960s American Mid-Century Modern Vintage Diamond Chair

Materials

Iron

Pair of Harry Bertoia Diamond Chairs
Located in Auribeau sur Siagne, FR
Harry Bertoia's iconic design for Knoll in chromed steel with Knoll cover in fabric.
Category

1960s American Vintage Diamond Chair

Vintage Mid-Century Black Knoll Bertoia Side Chair, Original Yellow Seat Pad
By Harry Bertoia, Knoll
Located in Buffalo, NY
Bertoia designed the patented diamond chair for Knoll in 1952. As a furniture designer, Bertoia is
Category

1960s American Mid-Century Modern Vintage Diamond Chair

Materials

Iron

One Vintage Midcentury Restored Knoll Bertoia Side Chair
By Harry Bertoia
Located in Pasadena, TX
California, developing new techniques for molding plywood. Bertoia designed the patented diamond chair for
Category

1970s American Mid-Century Modern Vintage Diamond Chair

Materials

Chrome

Great Harry Bertoia Diamond Chair for Knoll
By Harry Bertoia, Knoll
Located in Miami, FL
Great chair, white frame with a multicolored fabric.
Category

1970s American Mid-Century Modern Vintage Diamond Chair

Materials

Metal

Fab 50s Wire Lounge Chairs
Located in Miami, FL
at too! With a nod to Bertoia's Diamond chair...same period. Original cushions copied in vintage
Category

1950s American Vintage Diamond Chair

Materials

Foam

Harry Bertoia Knoll Pair of White Welded Metal Wire Diamond Armchairs 1952
By Harry Bertoia, Knoll
Located in Catania, IT
have black felt pads to protect the floor. The Diamond Chair is a stunning study in space and form
Category

1950s Italian Mid-Century Modern Vintage Diamond Chair

Materials

Metal

Diamond Wire Side Lounge Armchair by Bertoia Knoll International, Midcentury
By Harry Bertoia, Knoll
Located in Telgte, DE
cover Knoll textiles fabric The diamond chair is an astounding study in space, form and function by one
Category

1950s American Mid-Century Modern Vintage Diamond Chair

Materials

Steel

Iconic Harry Bertoia Chrome Bird Chair and Ottoman for Knoll
Located in Miami, FL
/> Ottoman measures 23.5" wide x 17" deep x 14.5" high. We have a matching Diamond chair as
Category

1950s American Vintage Diamond Chair

Materials

Chrome, Steel

Harry Bertoia Child s Wire Chairs, Pair
Located in Astoria, NY
: Iconic design: Inspired by the classic Bertoia Diamond Chair, these chairs are scaled down for smaller
Category

20th Century American Vintage Diamond Chair

Materials

Metal

Leslie Diamond lounge chair by Conant-Ball
By Conant Ball, Leslie Diamond
Located in Highland, IN
An elegant, understated design, this lounge chair by Leslie Diamond for Conant-Ball has an exposed
Category

1950s American Mid-Century Modern Vintage Diamond Chair

Materials

Upholstery

Pair of Emerald Green Eero Saarinen for Knoll Executive Arm Chairs
By Eero Saarinen, Knoll
Located in Chattanooga, TN
with our Saarinen tulip coffee table and Harry Bertoia Diamond chairs.
Category

Mid-20th Century American Mid-Century Modern Vintage Diamond Chair

Materials

Stainless Steel

Conant Ball Spindle Desk Chair / Side Chair in Solid Maple, C. 1960s
By Leslie Diamond
Located in Deland, FL
A Russel Wright for Conant Ball Furniture Makers Mid-Century Modern solid birch desk chair from the
Category

1960s American Mid-Century Modern Vintage Diamond Chair

Materials

Maple

Leslie Diamond for Conant Ball Pair of Lounge Chairs
By Conant Ball, Leslie Diamond
Located in Philadelphia, PA
Leslie Diamond pair of lounge chairs for Conant Ball Furniture Company dating to the 1950s newly re
Category

1950s American Mid-Century Modern Vintage Diamond Chair

Materials

Upholstery, Maple

Mid Century Modern Silver Wire Dining Side Chairs by Harry Bertoia for Knoll
By Harry Bertoia, Knoll
Located in Detroit, MI
industrial material and sculptural form of the iconic Diamond chair and side chair variation have become
Category

1970s American Mid-Century Modern Vintage Diamond Chair

Materials

Steel, Wire

Leslie Diamond for Conant Ball Mid Century Lounge Chairs, Pair
By Conant Ball, Leslie Diamond
Located in Franklin Park, IL
Leslie Diamond for conant ball mid century lounge chairs - pair These chairs measure: 28.5 wide
Category

1970s American Mid-Century Modern Vintage Diamond Chair

Materials

Upholstery, Wood

Scoop Chair by Leslie Diamond for Conant Ball in Teal Mohair
By Conant Ball, Leslie Diamond
Located in Brooklyn, NY
Scoop chair by Leslie Diamond for Conant Ball. Reupholstered in teal mohair. Blonde wood frame
Category

Mid-20th Century American Mid-Century Modern Vintage Diamond Chair

Materials

Mohair, Wood

Pair of Winged-arm Lounge Chairs after Robsjohn-Gibbings
By Leslie Diamond
Located in Westport, CT
stripped grey chenille. Designed by Leslie Diamond circa 1950's.
Category

20th Century American Mid-Century Modern Vintage Diamond Chair

Materials

Wood, Upholstery

4 Emerald Green Eero Saarinen for Knoll Executive Armchairs
By Eero Saarinen, Knoll
Located in Chattanooga, TN
Diamond chairs.
Category

Mid-20th Century American Mid-Century Modern Vintage Diamond Chair

Materials

Stainless Steel

Dining Chairs Attributed to ModernMates by Leslie Diamond for Conant Ball, Set 5
By Conant Ball, Leslie Diamond
Located in Topeka, KS
chairs and the ModernMates collection were designed by Leslie Diamond and NOT Russel Wright as is so
Category

Mid-20th Century American Mid-Century Modern Vintage Diamond Chair

Materials

Fabric, Wood

Leslie Diamond for Conant Ball Mid Century Dining Side Chairs, Set of 6
By Conant Ball, Leslie Diamond
Located in Franklin Park, IL
Leslie diamond for Conant ball mid century dining side chairs - set of 6 Each chair measures
Category

1970s American Mid-Century Modern Vintage Diamond Chair

Materials

Upholstery, Wood

Conant Ball Mid-Century Modern Maple and Cane Back Chair
By Conant Ball, Leslie Diamond
Located in New Windsor, NY
Solid maple and cane back side chair designed by Leslie Diamond for Conant Ball. Good overall
Category

1950s American Mid-Century Modern Vintage Diamond Chair

Materials

Cane, Maple

Bertoia Diamond Lounge Chair
Located in Wilton, CT
Diamond lounge chair designed in 1950 for Knoll by Harry Bertoia. Original bright yellow vinyl
Category

1950s American Vintage Diamond Chair

Vintage Coastal Palecek Diamond Weave Lounge Chairs - a Pair
By Palecek Furniture
Located in West Palm Beach, FL
Elevate your coastal retreat with our Vintage Coastal Palecek Diamond Weave Lounge Chairs - A Pair
Category

Late 20th Century Philippine Vintage Diamond Chair

Materials

Wicker

1950s Iron Spindle Fan Back Side Chairs, A Pair
By Modernmasters Inc., Paul McCobb, Clifford Pascoe, Freda Diamond
Located in New Windsor, NY
A very nice pair of spindle fan back side chairs. These are dining chair height and can also be
Category

1950s American Mid-Century Modern Vintage Diamond Chair

Materials

Iron

A Pair of Diamond Tufted Silk Upholstered Slipper Chairs
Located in Palm Desert, CA
A pair of slipper chairs newly upholstered in cream silk with mahogany finished wood feet
Category

20th Century American Vintage Diamond Chair

Spade, Club, Heart and Diamond Wood Chairs, Set of 4
Located in Brussels, BE
Spade, Club, heart and diamond wood chairs, set of 4.
Category

Mid-20th Century European Mid-Century Modern Vintage Diamond Chair

Materials

Wood

Set of Four 501 Lounge Chairs by Kai Lyngfeld Larsen in Teak, Denmark, 1950s
By Kai Lyngfeldt Larsen
Located in Uithoorn, NL
King of Diamonds Chair (1944) and Chinese Cabinet (also 1944, exhibited at the Guild of Joiners) and
Category

1950s Danish Vintage Diamond Chair

Materials

Fabric, Teak

Contemporary Modernist Pair of Bertoia Style Diamond Chrome Wire Accent Chairs
By Harry Bertoia
Located in Keego Harbor, MI
For your consideration is a beautiful pair of Harry Bertoia style, diamond shaped, chrome wire
Category

Late 20th Century Vintage Diamond Chair

Materials

Chrome

Harry Bertoia Knoll Small Diamond Lounge Chairs
By Harry Bertoia
Located in Cincinnati, OH
A pair of early white welded sculptural wire small diamond lounge chairs with bottom seat pad and
Category

Mid-20th Century American Modern Vintage Diamond Chair

Early MCM Bertoia for Knoll Metal and Leather Diamond Associate Accent Chair
By Harry Bertoia, Knoll
Located in Keego Harbor, MI
An early mid century modern Bertoia for Knoll metal and leather Diamond Associate accent chair. A
Category

Mid-20th Century Vintage Diamond Chair

Materials

Leather

Midcentury Black Diamond Lounge Chair by Harry Bertoia
By Harry Bertoia
Located in Detroit, MI
Original Vintage Mid Century Harry Bertoia for Knoll Black Diamond Wire Lounge Chair This
Category

Mid-20th Century American Mid-Century Modern Vintage Diamond Chair

Materials

Steel, Wire

Diamond Tufted Swivel Club Chairs by Harvey Probber
Located in San Diego, CA
Diamond tufted club chairs with self centering swivel bases designed by Harvey Probber.
Category

20th Century American Vintage Diamond Chair

Materials

Upholstery, Wood

Harry Bertoia for Knoll Diamond Lounge Chairs, Pair
By Harry Bertoia
Located in Las Vegas, NV
Clean pair of white diamond wire lounge chairs by Knoll. Designed by Harry Bertoia in 1952.
Category

1990s Mid-Century Modern Vintage Diamond Chair

Harry Bertoia Small Diamond Lounge Chair for Knoll
By Harry Bertoia
Located in Cincinnati, OH
A satin black wire chair with butterscotch wool upholstery by sculpture Harry Bertoia who designed
Category

Mid-20th Century American Vintage Diamond Chair

Set of 4 Diamond Wire Side Chair by Harry Bertoia for Knoll International, 1962
By Harry Bertoia, Knoll
Located in Telgte, DE
Set of four Diamond wire side chair by Harry Bertoia for Knoll International, 1962 Harry Bertoia's
Category

1950s German Mid-Century Modern Vintage Diamond Chair

Materials

Metal

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Vintage Diamond Chair For Sale on 1stDibs

Find many varieties of an authentic vintage diamond chair available at 1stDibs. Each vintage diamond chair for sale was constructed with extraordinary care, often using metal, steel and fabric. You’ve searched high and low for the perfect vintage diamond chair — we have versions that date back to the 20th Century alongside those produced as recently as the 20th Century are available. A vintage diamond chair, designed in the Mid-Century Modern style, is generally a popular piece of furniture. You’ll likely find more than one vintage diamond chair that is appealing in its simplicity, but Harry Bertoia, Knoll and Conant Ball produced versions that are worth a look.

How Much is a Vintage Diamond Chair?

A vintage diamond chair can differ in price owing to various characteristics — the average selling price 1stDibs is $1,525, while the lowest priced sells for $600 and the highest can go for as much as $7,500.

Finding the Right Seating for You

With entire areas of our homes reserved for “sitting rooms,” the value of quality antique and vintage seating cannot be overstated.

Fortunately, the design of side chairs, armchairs and other lounge furniture — since what were, quite literally, the early perches of our ancestors — has evolved considerably.

Among the earliest standard seating furniture were stools. Egyptian stools, for example, designed for one person with no seat back, were x-shaped and typically folded to be tucked away. These rudimentary chairs informed the design of Greek and Roman stools, all of which were a long way from Sori Yanagi's Butterfly stool or Alvar Aalto's Stool 60. In the 18th century and earlier, seats with backs and armrests were largely reserved for high nobility.

The seating of today is more inclusive but the style and placement of chairs can still make a statement. Antique desk chairs and armchairs designed in the style of Louis XV, which eventually included painted furniture and were often made of rare woods, feature prominently curved legs as well as Chinese themes and varied ornaments. Much like the thrones of fairy tales and the regency, elegant lounges crafted in the Louis XV style convey wealth and prestige. In the kitchen, the dining chair placed at the head of the table is typically reserved for the head of the household or a revered guest.

Of course, with luxurious vintage or antique furnishings, every chair can seem like the best seat in the house. Whether your preference is stretching out on a plush sofa, such as the Serpentine, designed by Vladimir Kagan, or cozying up in a vintage wingback chair, there is likely to be a comfy classic or contemporary gem for you on 1stDibs.

With respect to the latest obsessions in design, cane seating has been cropping up everywhere, from sleek armchairs to lounge chairs, while bouclé fabric, a staple of modern furniture design, can be seen in mid-century modern, Scandinavian modern and Hollywood Regency furniture styles.

Admirers of the sophisticated craftsmanship and dark woods frequently associated with mid-century modern seating can find timeless furnishings in our expansive collection of lounge chairs, dining chairs and other items — whether they’re vintage editions or alluring official reproductions of iconic designs from the likes of Hans Wegner or from Charles and Ray Eames. Shop our inventory of Egg chairs, designed in 1958 by Arne Jacobsen, the Florence Knoll lounge chair and more.

No matter your style, the collection of unique chairs, sofas and other seating on 1stDibs is surely worthy of a standing ovation.

Questions About Vintage Diamond Chair
  • 1stDibs ExpertOctober 12, 2021
    A vintage diamond — as in, “a vintage diamond engagement ring” — refers to a ring that is at least 20 years old. Antique rings were made more than 100 years ago. Vintage diamond jewelry is not old enough to qualify as antique but it is at least two decades old. Find a collection of antique and vintage diamond jewelry on 1stDibs today.
  • 1stDibs ExpertMarch 22, 2022
    Italian-American designer Harry Bertoia made the Diamond chair in 1952, and his design went into production in 1983. The original chair featured a woven steel wire back with angled wings resting on angled wire legs. Find a collection of Harry Bertoia Diamond chairs on 1stDibs.
  • 1stDibs ExpertApril 5, 2022
    The diamond chair was made using welded steel with rods in either chrome or bonded rilsan. The chair was scratch, chip, and chemical resistant. You can shop a selection of Bertoia Diamond chairs from some of the world’s top enthusiasts on 1stDibs.
  • 1stDibs ExpertFebruary 17, 2023
    To be vintage, a chair typically needs to be at least 20 years old, while a chair older than 100 years is an antique. On 1stDibs, find a variety of antique, vintage and modern dining chairs from some of the world's top sellers.
  • 1stDibs ExpertApril 5, 2022
    Many factors like wood, construction, and patina come into play when you date a vintage chair. If you can’t find a maker’s mark or any other kind of identifying mark on the piece, consult a furniture encyclopedia or a certified expert. On 1stDibs, you’ll find a collection of vintage chairs from some of the world’s top sellers.
  • 1stDibs ExpertOctober 30, 2024
    Whether vintage diamond rings are worth more varies. Many factors influence the potential selling price of vintage and contemporary rings, including their maker, style and condition. The type of precious metal and the diamond's color, clarity, cut and carat weight will also impact the ring's price. Explore a wide variety of vintage diamond rings on 1stDibs.
  • 1stDibs ExpertJune 15, 2023
    To tell how old a vintage chair is, first try and locate the manufacturer's label, tag or mark. Typically, identifying markings and tags appear under cushions or on the undersides of chairs. You may find that the date of manufacturing appears on the label or tag. If not, check trusted online resources to find out when the manufacturer was in business to make an estimate of the age. When in doubt, enlist the help of a certified appraiser or antiques dealer to help you date a particular chair. Find an assortment of antique, vintage and modern chairs on 1stDibs.
  • 1stDibs ExpertMarch 22, 2022
    To know if your vintage Eames chair is real, check for a reclining mechanism. On original chairs, the back had a permanent reclined position, so no mechanism is necessary. Also, a vintage piece is around 32 inches high, while later reproductions are normally bigger. On 1stDibs, shop a selection of expertly vetted Eames chairs.
  • 1stDibs ExpertNovember 4, 2024
    To identify a vintage Gunlocke chair, examine the legs. Most pieces will feature a tag that bears the brand name. On antique and early vintage chairs, the label will usually be made of paper or leather, while riveted brass tags appear on later vintage and contemporary chairs. Once you've confirmed that Gunlocke is the maker by checking the tag, browse the company's catalogues, which are available online, to determine approximately when it was made. Some tags may include a style or color number that will expedite the search. If your chair is 20 to 99 years old, it is vintage, while pieces that are 100 years old or older are antiques. You may wish to enlist the help of a certified appraiser or knowledgeable antiques dealer when identifying your chair. On 1stDibs, explore a collection of Gunlocke chairs.
  • 1stDibs ExpertJune 6, 2024
    The Bertoia Diamond chair's weight varies depending on its upholstery. However, the uncovered wire frame weighs around 9 kilograms, or 19.8 pounds. Part of the iconic lounge chair's appeal is its lightweight design, which makes it easy to move around outdoor spaces. Shop a selection of Harry Bertoia Diamond chairs on 1stDibs.
  • 1stDibs ExpertOctober 15, 2024
    To tell if a vintage diamond ring is real, you can first research the maker using trusted online resources. Hallmarks found on the inside of the band can provide a starting point for identifying a maker. By reading about the maker, you can find out if they typically produced fine jewelry or costume jewelry. If the maker of your ring was a fine jewelry maker, your ring is more likely to contain a real diamond. Another option is to take your ring to a certified appraiser or experienced jeweler who can assist in identifying the stone. On 1stDibs, shop a diverse assortment of vintage diamond rings.
  • 1stDibs ExpertAugust 20, 2024
    To tell if a Bertoia Diamond chair is real, examine its details closely. First, look at the corners of the backrest on the wire frame. An authentic chair will have gently rounded corners, so sharp points or rough areas may indicate a replica. Next, measure the dowels that form the base. Genuine chairs have dowels that are exactly 0.5 inches in diameter. Reproductions tend to feature significantly thicker dowels. If you're still uncertain about authenticity, a certified appraiser or knowledgeable antique dealer can assist you. Find a collection of Bertoia Diamond chairs on 1stDibs.