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14kt Yellow Gold, Mother of Pearl, Black Onyx and Diamond Harlequin Ring
Located in McLeansville, NC
A 14 karat yellow gold, mother of pearl, black onyx and diamond harlequin ring. A tapered design
Category

Vintage 1980s Cocktail Rings

Materials

Diamond, Onyx, Pearl, Gold, 14k Gold, Yellow Gold

Mediterranean Coral, Diamonds, Emerald and Black Onyx Pendant in 18 Karat Gold
Located in Crema, Cremona
chain from UnoAerre, Arezzo, Italy. The oval-shape pendant has a central square cut emerald, 28 (plus 4
Category

20th Century Art Deco Pendant Necklaces

Materials

Coral, Diamond, Emerald, Onyx, Gold, 18k Gold

Set in 18K Gold, natural Zambian Emerald, Black Onyx Diamonds Cocktail Ring
By JEWEL HUB
Located in Hong Kong, HK
Gold & Diamonds. The weight of square Emerald is 0.53 carats. The Emerald is completely natural
Category

21st Century and Contemporary Indian Art Deco Cocktail Rings

Materials

Diamond, Emerald, Onyx, 18k Gold, Yellow Gold

Oocite, Square Abstract Blue Green Red Painting with Diamond Dust on Plexiglas
By Lorraine Glessner
Located in Kent, CT
This square painting on plexiglas panel seamlessly combines collage elements with acrylic paint and
Category

2010s Contemporary Abstract Paintings

Materials

Mixed Media, Panel, Plexiglass, Acrylic

Christian Dior 1980s Vintage Large Square Blue Black Crystals Chunky Earrings
By Christian Dior
Located in Wokingham, England
Christian Dior 1980s Vintage Baroque Large Square Blue Black Dots Diamond Crystals Chunky Clip
Category

Vintage 1980s German Art Deco Clip-on Earrings

Materials

Gold Plate

Christian Dior 1980s Vintage Large Square Blue Black Crystals Chunky Earrings
By Christian Dior
Located in Wokingham, England
Christian Dior 1980s Vintage Baroque Large Square Blue Black Dots Diamond Crystals Chunky Clip
Category

Vintage 1980s German Art Deco Clip-on Earrings

Materials

Gold Plate

JASON OF BEVERLY HILLS Black White Diamond 14K White Gold Stud Earrings
Located in Thiensville, WI
gold square setting with pave set black diamonds at center surrounded by pave set diamonds. Screw post
Category

21st Century and Contemporary Stud Earrings

Piaget Emperador Factory Diamond and 18k Yellow Gold Watch
By Piaget
Located in La Jolla, CA
all 18k Yellow Gold timepiece featuring a Square Diamond Dial with Black Hands and Factory Single Cut
Category

Late 20th Century Unknown Wrist Watches

Materials

Diamond, 18k Gold, Yellow Gold

Asprey 18 Karat Onyx Diamond Tuxedo Studs Set
By Asprey International Limited
Located in Toronto, ON
century. The four studs of square shape, each set with a square cut diamond and black onyx centre, the
Category

20th Century Cufflinks

Christian Dior Vintage 1980s Swirl Crystals Black Enamel Shield Clip Earrings
By Christian Dior
Located in Wokingham, England
Christian Dior Vintage 1980s Unisex Swirl Crystals Black Enamel Diamond Square Cube Shield
Category

Vintage 1980s German Art Deco Clip-on Earrings

Materials

Gold Plate, Enamel

Christian Dior Vintage 1980s Swirl Crystals Black Enamel Shield Clip Earrings
By Christian Dior
Located in Wokingham, England
Christian Dior Vintage 1980s Swirl Crystals Black Enamel Diamond Square Cube Shield Modernist Clip
Category

Vintage 1980s German Art Deco Clip-on Earrings

Materials

Gold Plate, Enamel

Light and Dark Log Cabin Quilt
Located in Darnestown, MD
this wonderful pattern. The same fabrics form a square around the center black diamond. A variety of
Category

Antique 19th Century Quilts

Native American Antique Indian Navajo Kilim Rug, Navajo Saddle Blanket
By Navajo
Located in Dallas, TX
hand-woven wool Native American antique Indian Navajo kilim rug features a large black square filled
Category

Early 20th Century American Navajo North and South American Rugs

Materials

Wool

Signed KJL Kenneth J Lane Bypass Statement Cuff Bracelet
By Kenneth Jay Lane
Located in Montreal, QC
Stunning Kenneth Jay Lane Crossover Cuff Bracelet set with Sparkling Square Black and Clear Faux
Category

1990s American Contemporary Cuff Bracelets

Materials

Gold Plate

Men s Rhodium Silver Cuff Bracelet with Square Black Diamonds by Allison Bryan
By Allison Bryan
Located in London, GB
A simple men's cuff bracelet in black rhodium-plated sterling silver with and two square black
Category

2010s British Cuff Bracelets

Materials

Black Diamond, Rhodium, Sterling Silver

Men s Rhodium Silver Cuff Bracelet with Square Black Diamonds by Allison Bryan
By Allison Bryan
Located in London, GB
A simple men's cuff bracelet in black rhodium-plated sterling silver with and two square black
Category

2010s British Cuff Bracelets

Materials

Black Diamond, Rhodium, Sterling Silver

84 Carat Total Square Black Diamond Multi Strand Necklace in 14 Karat White Gold
Located in Chicago, IL
This 4 row, dramatic layered necklace showcases 84 carats of precision cut black diamonds into
Category

2010s American Contemporary Beaded Necklaces

Materials

Black Diamond, 14k Gold, White Gold

Black Diamond Square Face Cufflinks
By Roman Malakov
Located in New York, NY
Whale back cufflinks showcasing a square face encrusted with black diamonds. Black diamonds weigh
Category

2010s American Contemporary Cufflinks

Materials

Diamond, Black Diamond, 14k Gold, White Gold

8.44 Carat Square Cut Black Diamond White Gold Ring
By Roshe Jewels
Located in Los Angeles, CA
8.44 Carat Square Cut Black Diamond White Gold Engagement Ring! Huge Square Cut Black Diamond Ring
Category

21st Century and Contemporary American Modern Engagement Rings

Materials

Diamond, Black Diamond, 14k Gold, White Gold

EFFY Collection Black and White Diamond Pave Square Ring 2.02 Carat Total
By Effy
Located in Scottsdale, AZ
Ring size: 6.5 Brilliant black and white pave diamond cocktail ring by Effy fills the finger with
Category

21st Century and Contemporary Unknown Contemporary Band Rings

Materials

Diamond, White Diamond, Black Diamond, Gold, 14k Gold, White Gold

1970s Diamond Bar Ring Black Onyx 14 Karat Yellow Gold Square Stacking Band
Located in Torrance, CA
Stylish vintage black onyx & diamond bar ring (circa 1970s) crafted in 14 karat yellow gold
Category

Late 20th Century Unknown Modern Band Rings

Materials

Diamond, White Diamond, Onyx, 14k Gold, Yellow Gold

Black Onyx Square 14k Yellow Gold Ring By Goldmaster Circa 1970
Located in Los Angeles, CA
Vintage black onyx square yellow gold ring made by Goldmaster, circa 1970. When examining the
Category

Vintage 1970s Modernist Cocktail Rings

Materials

Onyx, 14k Gold, Yellow Gold

1.93 Carat Old Cut Diamond Ring with Black Onyx White Gold Square Halo Ring
Located in Addison, TX
black onyx for a added level of contrast to really make the diamonds pop! This beautiful ring is in
Category

Vintage 1940s Art Deco Engagement Rings

Materials

Diamond, Onyx, 14k Gold, White Gold

Georgios Collection 18 Karat Yellow Gold Diamond Square Cross with Chain
By Georgios Collections Inc
Located in Astoria, NY
velvet look and features 6 Brilliant cut Diamonds total weight of 0,09 Carats, and comes with a Chain of
Category

21st Century and Contemporary Greek Byzantine Necklace Enhancers

Materials

Diamond, White Diamond, Blue Diamond, Yellow Diamond, Pink Diamond, Blac...

David Yurman 925 Sterling Silver Diamond Black Onyx Albion Stud Earrings
By David Yurman
Located in Houston, TX
: 20.61 Grams Silver diamond and onyx stud clip-on earrings. The metal was tested and determined to be
Category

21st Century and Contemporary Unknown Stud Earrings

Materials

Diamond, Onyx, Silver, Sterling Silver

Jona Rose Cut Black Diamond White Diamond 18 Karat Rose Gold Stud Earrings
By Jona
Located in Torino, Piedmont
of square cut black diamonds weighing 1.20 total carats, surrounded by 34 round cut white diamonds
Category

21st Century and Contemporary Italian Stud Earrings

Materials

White Diamond, Black Diamond, 18k Gold, Rose Gold

Black Onyx Diamond Gold Dangle Earrings
By GADI
Located in Stamford, CT
the bars of diamonds. 2 square black Onyx, 15 x 15.93 x 4.45mm 144 round full cut diamonds, approx
Category

Early 2000s Dangle Earrings

Materials

Diamond, Onyx, 18k Gold, White Gold

Natural Aquamarine, Ruby, Black Enamel Diamonds Engagement Ring Set in 18K Gold
By JEWEL HUB
Located in Hong Kong, HK
A very gorgeous and one of a kind, Aquamarine, Ruby & Black Enamel Engagement Ring set in 18K White
Category

2010s Indian Art Deco Engagement Rings

Materials

Aquamarine, Diamond, Ruby, 18k Gold, White Gold, Enamel

2.11 Carat Black Diamond 18 Karat Yellow Gold Ring
By Roshe Jewels
Located in Los Angeles, CA
This gorgeous Yellow Gold Black Diamond Bridal Ring has a center Square Cut Black Diamond that
Category

21st Century and Contemporary American Modern Cocktail Rings

Materials

White Diamond, Black Diamond, 18k Gold, Yellow Gold

Men s Rose Gold Cuff with Black Diamonds by Allison Bryan
By Allison Bryan
Located in London, GB
black diamonds. Total carat weight of the diamonds is .016 carats. The cuff bracelet is slightly
Category

2010s British Cuff Bracelets

Materials

Black Diamond, Rose Gold

Yellow Gold Cuff Bracelet with Black Diamonds by Allison Bryan
By Allison Bryan
Located in London, GB
beveled edges and two black diamonds. Total diamond carat weight .016 carats. The bracelet is slightly
Category

2010s British Cuff Bracelets

Materials

Black Diamond, 9k Gold

2.11 Carat Black Diamond 18 Karat Yellow Gold Bridal Ring
By Roshe Jewels
Located in Los Angeles, CA
This gorgeous Yellow Gold Black Diamond Bridal Ring has a center Square Cut Black Diamond that
Category

21st Century and Contemporary American Modern Cocktail Rings

Materials

White Diamond, Black Diamond, 18k Gold, Yellow Gold

Men s Yellow Gold Cuff with Black Diamonds by Allison Bryan
By Allison Bryan
Located in London, GB
black diamonds. Total carat weight of the diamonds is .016 carats. The cuff bracelet is slightly
Category

2010s British Cuff Bracelets

Materials

Black Diamond, 9k Gold, Yellow Gold

Painted Biedermeier Chest of Drawers, 19th Century
Located in Greding, DE
Three-drawered yellow Biedermeier chest of drawers on square pointed feet with black diamond
Category

Antique 19th Century European Biedermeier Commodes and Chests of Drawers

Materials

Wood

Bucherer Gold 14 Carat Black Diamond Square Band Ring
By Bucherer
Located in Lambertville, NJ
Brand new with tag Bucherer 18k gold ring, with 14ctw black diamonds. Retail $5690. Comes with box
Category

21st Century and Contemporary German More Rings

Materials

Black Diamond, Gold

14 Karat Rose Gold and Black Diamond Stacking Square Ring
By DRU.
Located in Los Angeles, CA
Unique in its shape and style, this 14k rose gold and black diamond ring is meant to be stacked
Category

2010s American Contemporary Band Rings

Materials

Black Diamond, 14k Gold

14 Karat Rose Gold and Black Diamond Stacking Square Ring
By DRU.
Located in Los Angeles, CA
Unique in its shape and style, this 14k rose gold and black diamond ring is meant to be stacked
Category

2010s American Contemporary Band Rings

Materials

Black Diamond, 14k Gold

14 Karat White Gold and Black Diamond Stacking Square Ring
By DRU.
Located in Los Angeles, CA
Unique in its shape and style, this 14k white gold and black diamond ring is meant to be stacked
Category

2010s American Contemporary Band Rings

Materials

Black Diamond, 14k Gold

18k White Gold and Sterling Silver Square Meteorite and Black Diamond Cufflinks
By Llyn strong
Located in Greenville, SC
with .24 carats of black diamonds. Designed and made by llyn strong.
Category

2010s American Contemporary Cufflinks

Materials

Black Diamond, 18k Gold, White Gold, Sterling Silver

Black Diamond d Avossa Man and Woman Ring
Located in Roma, IT
Black gold d'Avossa Ring with a central square cut Black Diamond of 3.45 cts on a pavé of 2.10 cts
Category

2010s Fashion Rings

Materials

Black Diamond, 18k Gold

18 Karat Yellow Gold Matte Black Onyx and Diamond Rounded Square Cufflinks
Located in Vail, CO
black onyx inlay with a single, full cut, round brilliant diamond in each. Diamonds equal .18ctw and are
Category

21st Century and Contemporary Unknown Contemporary Cufflinks

Materials

Diamond, Onyx, 18k Gold

Shima Azman Black Diamond Heart Signet Ring
By Shima Azman
Located in London, GB
encrusted in black diamond -Signet ring with black diamond heart -Square shape -Each ring is custom made and
Category

21st Century and Contemporary Signet Rings

Materials

White Diamond, Black Diamond, 18k Gold

18k Gold Art Deco Style Cocktail Ring 6.58ct Aquamarine Black Onyx Diamonds
By Doves by Doron Paloma
Located in Great Neck, NY
18K White Gold Art Deco Style Cocktail Ring, Featuring Square Aquamarine, Black Onyx Inlay, and
Category

21st Century and Contemporary American Art Deco Cocktail Rings

Materials

Aquamarine, Diamond, White Diamond, Onyx, Gold, 18k Gold, White Gold

Shima Azman Black Diamond Heart Signet Ring, Made to Order
By Shima Azman
Located in London, GB
encrusted in black diamond -Signet ring with black diamond heart -Square shape -Each ring is custom made and
Category

21st Century and Contemporary Signet Rings

Materials

White Diamond, Black Diamond, 18k Gold

Piaget Classic 934D2 18 Karat Black Dial Quartz Watch
By Piaget
Located in Miami, FL
buckle. This Piaget watch has a 25.5 x 25.5 mm case with a Square caseback and Black Diamond dial. Circa
Category

Vintage 1980s Modern Wrist Watches

Henry Dunay Gold Black Jade Diamond Square Ring
By Henry Dunay
Located in Lambertville, NJ
An unusual square black jade band ring decorated with 18k yellow gold and diamonds by Henry Dunay
Category

20th Century American Band Rings

Materials

Diamond, Jade, 18k Gold

Diamond Paveè Black and White Gold Square Ring Made in Italy
By Gilberto Cassola
Located in Valenza, AL
Gilberto Cassola 18Kt White Gold Band Ring with a Paveé Set of Black and White Diamonds. Handmade
Category

2010s Italian Contemporary Cocktail Rings

Materials

Diamond, Black Diamond, 18k Gold, White Gold

White Gold 18k Black Onyx and Diamond Earrings
Located in Rome, IT
Elegant square earrings in 18-carat white gold with black onyx surrounded by diamonds. These
Category

2010s Italian Modern More Earrings

Materials

Diamond, Onyx, 18k Gold, White Gold

Monique Péan Meteorite and Black Diamond Pen, 18 Carat Palladium White Gold
By Monique Péan
Located in New York, NY
Widmanstätten pattern meteorite inlay pen with inset square cut black diamond, 18 carat recycled
Category

2010s American Desk Accessories

Materials

Black Diamond, 18k Gold, White Gold, Palladium

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Square Black Diamond For Sale on 1stDibs

You are likely to find exactly the square black diamond you’re looking for on 1stDibs, as there is a broad range for sale. Frequently made of Gold, Silver and 18k Gold, this item was constructed with great care. Find an antique version now, or shop for 10 vintage or 80 modern creation for a more contemporary example of these cherished accessories. Finding the perfect square black diamond may mean sifting through those created during different time periods — you can find an early version that dates to the 20th Century and a newer variation that were made as recently as the 21st Century. There have been many well-made iterations of the classic square black diamond over the years, but those made by Vitale 1913, DRU. and Georgios Collections Inc are often thought to be among the most beautiful. A square black diamond can make for a versatile accessory, but a selection from our variety of 84 Diamond versions can add an especially stylish touch. Today, if you’re looking for a square cut version of this piece and are unable to find the perfect match, our selection also includes round cut and brilliant cut alternatives. When shopping for a square black diamond, you’ll find that there are less available pieces for unisex or men today than there are for women.

How Much is a Square Black Diamond?

Prices for a square black diamond can differ depending upon size, time period and other attributes — at 1stDibs, these accessories begin at $109 and can go as high as $90,500, while this accessory, on average, fetches $2,807.

The Legacy of Diamond in Jewelry Design

Antique diamond rings, diamond tiaras and dazzling vintage diamond earrings are on the wish lists of every lover of fine jewelry. And diamonds and diamond jewelry are primarily associated with storybook engagements and red-carpet grand entrances — indeed, this ultra-cherished gemstone has a dramatic history on its hands.

From “A Diamond Is Forever” to “Diamonds Are a Girl’s Best Friend,” pop culture has ingrained in our minds that diamonds are the most desired, the most lasting and the most valuable gemstone. But what makes the diamond so special? Each stone — whether it’s rubies, sapphires or another stone — is unique and important in its own right. April babies might claim diamonds for themselves, but just about everyone wants this kind of sparkle in their lives!

There are several factors that set diamonds apart from other stones, and these points are important to our gem education.

Diamonds are minerals. They are made up of almost entirely of carbon (carbon comprises 99.95 percent; the remainder consists of various trace elements). Diamonds are the hardest gemstones, ranking number 10 on the Mohs Hardness Scale. Even its name, diamond, is rooted in the Greek adamas, or unconquerable. The only object that can scratch a diamond is another diamond. Diamonds are formed deep within the earth at very high temperatures (1,652–2,372 degrees Fahrenheit at depths between 90 and 120 miles beneath the earth’s surface) and are carried up by volcanic activity. Diamonds are quite rare, according to the Gemological Institute of America, and only 30 percent of all the diamonds mined in the world are gem quality.

In the 1950s, the Gemological Institute of America developed the 4Cs grading system to classify diamonds: clarity, color, cut and carat weight. Not all diamonds are created equal (there are diamonds, and then there are diamonds). The value of the diamond depends on the clarity (flawless diamonds are very rare but a diamond's value decreases if there are many blemishes or inclusions), color (the less color the higher the grade), cut (how the diamond’s facets catch the light, certain cuts of diamonds show off the stone better than others) and carat weight (the bigger, the better).

When you start shopping for a diamond engagement ring, always prioritize the cut, which plays the largest role in the diamond's beauty (taking the time to clean your diamond ring at least every six months or so plays a role in maintaining said beauty). And on 1stDibs, a range of buying guides can be found for those in the market for antique engagement ringsvintage engagement rings or Art Deco engagement rings

Shop antique and vintage diamond rings, diamond necklaces and other extraordinary diamond jewelry on 1stDibs.  

Questions About Square Black Diamond
  • 1stDibs ExpertOctober 12, 2021
    A square diamond is sometimes known as a princess-cut diamond. Princess-cut diamonds have only been in their current form since the 1960s, making them a relatively new diamond shape. The beauty, flair, and edge of a square diamond are well-known. Shop a range of antique and vintage diamond jewelry on 1stDibs today.
  • There are a few diamond cuts that can be considered square diamond rings. Here is a list: 1. Emerald cut 2. Asscher cut 3. Princess cut 4. Radiant.cut 5. Cushion cut
  • 1stDibs ExpertNovember 13, 2024
    What a square-cut diamond is called depends on how the jeweler arranged its facets. A princess-cut diamond has a square shape and a brilliant cut that maximizes its sparkle. Another square-shaped cut is the Asscher, which is stepped to show off a diamond's color and clarity. Find a large selection of diamond jewelry on 1stDibs.
  • 1stDibs ExpertApril 5, 2022
    Yes, a black diamond is indeed a real diamond. There are three types of black diamonds; natural, Carbonado and treated black diamonds. Treated black diamonds are altered with high pressure and high heat to achieve the black color. Shop a collection of expertly vetted gems from some of the world’s top sellers on 1stDibs.
  • 1stDibs ExpertFebruary 22, 2021
    Yes, a black diamond is a real diamond. Black diamonds have the same chemical composition as traditional colorless diamonds. Although black diamonds are rarer than colorless diamonds, they are less coveted and therefore cheaper.
  • 1stDibs ExpertOctober 12, 2021
    Black diamonds are said to have a deep spiritual connotation and are frequently used to ward off evil. The gorgeous dark gemstone is thought to offer a link between the spiritual and physical worlds. Diamonds, in general, represent a deep emotional bond, which is why they are ideal for engagement rings. On 1stDibs, find a variety of black diamond jewelry and watches.
  • 1stDibs ExpertAugust 26, 2024
    The difference between a black diamond and a black sapphire is that the two are different gemstones. A black diamond consists of carbon converted to a crystalline solid through changes driven by pressure and temperature. A black sapphire is a type of corundum, an aluminum oxide mineral. Generally, black diamonds are harder, rarer and more expensive than black sapphires. On 1stDibs, shop an assortment of black diamond and sapphire jewelry.
  • 1stDibs ExpertSeptember 9, 2024
    Yes, black diamonds are generally worth something. The specific value of a genuine black diamond depends on its size, measured in carats, as well as its color, cut and clarity. If you own a black diamond or a piece set with one, a certified appraiser or knowledgeable jeweler can give you an idea of how much it may be worth. Shop a variety of black diamond jewelry on 1stDibs.
  • 1stDibs ExpertFebruary 22, 2021
    White, or colorless, diamonds are generally the most valuable diamond variety. Black diamonds are certainly more rare than white ones, but the latter is generally more expensive.
  • 1stDibs ExpertApril 5, 2022
    What black diamond rings symbolize is largely a matter of personal interpretation. Charisma, power, passion and self-assuredness are some of the characteristics commonly associated with black diamond jewelry. Shop a range of diamond gemstone rings from top sellers around the world on 1stDibs.
  • 1stDibs ExpertNovember 1, 2023
    Black diamond engagement rings are popular for many couples. An antique, new or vintage black diamond engagement ring is an edgy, dramatic choice. Just keep in mind that with diamonds, it's all about sparkle, and the darkness of a black stone obscures its fire and brilliance. If the inky opacity of a black diamond seems a bit extreme and you'd like a little light to shine through, consider a gray diamond, which can be cut for maximum brilliance. Brides with a taste for the cool and unusual might also consider salt-and-pepper diamonds, which have white and black inclusions that produce a silvery gray, speckled look. Find black diamond engagement rings on 1stDibs.
  • 1stDibs ExpertOctober 5, 2021
    What a 1-carat black diamond is worth varies according to the cut, type (natural/treated) and the demand and supply. Both natural and treated black diamonds increase in value as demand increases. It ranges from $100 to $3,000 per carat. On 1stDibs, you can find a variety of unique and designer black diamond jewelry watches from different periods to choose from.
  • 1stDibs ExpertNovember 14, 2023
    To tell if black diamond earrings are real, first examine the surface of the gemstones. Real black diamonds usually have imperfections, while fakes usually appear flawless. Because it can be difficult to identify well-made synthetic gemstones with the naked eye, consider consulting a knowledgeable jeweler, dealer or appraiser for assistance with authentication. Find a variety of black diamond jewelry on 1stDibs.
  • 1stDibs ExpertFebruary 22, 2021
    Black diamonds can make good engagement rings because they symbolize authority, power and passion. They also can be less expensive than clear diamonds.
  • 1stDibs ExpertNovember 8, 2023
    Whether black diamond engagement rings are bad luck depends on a person's individual beliefs. In Italy, rubbing a black stone like a black diamond is considered good luck by some people. However, in India, black diamonds are a traditional symbol of bad luck. Find a variety of diamond engagement rings on 1stDibs.
  • 1stDibs ExpertNovember 13, 2024
    The artist known for the black-and-white optical illusion art called Movement in Squares is Bridget Riley. Riley states that she draws inspiration for her spectacular abstractions expressed in paintings and prints largely from nature, which she defines as a “dynamism of visual forces — an event rather than an appearance.” The British artist produced her iconic piece, Movement in Squares, in 1961. Find a wide range of Bridget Riley art on 1stDibs.