Kosta Boda art glass occupies a distinct position in the world of Scandinavian design: bold where most crystal is restrained, expressive where most glassware is anonymous, and built around individual artists whose signatures carry as much meaning as the brand itself.
Founded in 1742 in the forests of Småland, Sweden, Kosta Boda is the oldest active glassworks in Sweden and one of the most consistently innovative in the world.
In this blog, we explore the history of Kosta Boda art glass, the designers who shaped its identity, the most collectible series and figurines, how to identify genuine pieces, and what drives value on the secondary market.
The History of Kosta Boda Art Glass
Kosta Glasbruk was founded on 26 July 1742 by two officers in the army of King Charles XII of Sweden: Anders Koskull and Georg Bogislaus Stäel von Holstein. The company’s name is a portmanteau of their surnames, Ko(skull) and Sta(el von Holstein), and it was established in Kosta, a village in the forested province of Småland whose location offered both proximity to major Swedish cities and an abundant supply of timber to fuel the furnaces. Early production consisted of window glass, chandeliers, drinking glasses, and bottles.
For most of its first century and a half, Kosta produced glass closely modelled on European styles. That changed in 1897, when the company’s glassware was criticised at the General Art and Industrial Exposition in Stockholm for resembling the output of other European manufacturers too closely. The response was decisive: in 1898 Kosta hired the painter Gunnar Wennerberg as its first in-house designer, initiating a tradition of artist collaboration that defines the brand to this day. Wennerberg worked in the Art Nouveau style, bringing an organic, nature-inspired aesthetic to the glassworks’ output.
The pivotal structural moment came in 1976, when Kosta Glasbruk merged with Boda Glasbruk and Åfors Glassworks to form Kosta Boda AB. This merger brought together complementary traditions: Kosta’s classical elegance and Boda’s modernist experimentation. The combined entity attracted some of the most significant glass artists working in Sweden, producing the bold, expressive work that established Kosta Boda’s international reputation. Since 2005, Kosta Boda has been part of New Wave Group, which continues to operate the glassworks in Kosta under the Kosta Boda name.
The Designers Who Define Kosta Boda Art Glass
Kosta Boda’s identity as a collectible art glass brand rests almost entirely on its artists. Unlike most crystal manufacturers, Kosta Boda treats its designers as named individuals whose work is signed, numbered, and identified by series. For collectors, knowing the key designers is essential.
Bertil Vallien (born 1938) is the most celebrated and collectible of all Kosta Boda artists. His partnership with the glassworks began in the 1960s, and in 2023 Kosta Boda celebrated 60 years of collaboration with him. Vallien is best known for his sand-cast glass sculptures, particularly his enigmatic boat forms and encapsulated heads and faces that explore themes of myth, identity, and time. His Unique series pieces, produced in very small numbers and individually inscribed, are among the most valuable Kosta Boda works at auction, regularly appearing at Bonhams and other major houses. His earlier series work, including the Galaxy Blue series introduced in 1982 and the Zoo animal series created in 1975, are accessible and widely collected.
Ulrica Hydman-Vallien (1938–2018) brought an entirely different sensibility to Kosta Boda: exuberant, painterly, and unmistakably personal. Her hand-painted glass featuring snakes, flowers, faces, and figurative motifs gave Kosta Boda some of its most recognisable imagery. Her Open Minds series, featuring stylised female faces in bold colour, is among the most instantly identifiable Kosta Boda work and consistently attracts collector interest.
Göran Wärff brought a more minimal approach, focusing on form, light refraction, and subtle colour gradients. His pieces, often in softer tones and with gently curved silhouettes, represent a quieter but equally refined strand of Kosta Boda’s output. Anna Ehrner’s work is characterised by swirling colour effects and contemporary shapes, making her vases and bowls particularly popular for modern interiors. Erik Höglund, active from the 1950s, introduced a rougher, more primitive aesthetic that was deeply influential on Swedish glass design more broadly.
The Most Collectible Kosta Boda Art Glass Series
Several series stand out as particularly sought after on the Kosta Boda secondary market.
Bertil Vallien’s Boda Zoo series, created in 1975, produced a range of small animal figurines in clear and coloured glass, including hippopotamuses, elephants, and other wildlife subjects. These modest-sized pieces have a devoted collector following and appear regularly on the secondary market; complete sets of twelve command meaningful premiums. The Kennel series, featuring dog breeds, was a companion to the Zoo range and is similarly collected.
The Snowball series is among the most recognised Kosta Boda collectibles across all categories. These distinctive candle holders, characterised by their spherical form and textured bubble surface that refracts candlelight in all directions, have been produced in a range of colours and sizes. Vintage Snowball pieces from the 1970s and 1980s in unusual colourways attract the strongest collector interest. The series remains in production, so confirming the production era from the base markings matters for valuation.
Vallien’s Galaxy Blue series, introduced in 1982, produced vases and vessels with rich iridescent blue colouring and a distinctive handblown quality. Complete cohesive collections of these pieces appear occasionally at auction and have performed well. His Artist Collection miniature vessels and mini sculptures are among the most accessible entry points for Kosta Boda collectors, offering signed pieces in a range of price points.
Ulrica Hydman-Vallien’s Open Minds series and her Artist Collection painted pieces are the most collected of her output. The hand-painted faces and figurative decoration on these pieces are immediately recognisable and, given Hydman-Vallien’s death in 2018, the supply of her work is now finite, which has supported secondary market interest.
How to Identify Kosta Boda Art Glass
Identifying genuine Kosta Boda art glass involves examining the base markings, understanding how the brand’s labelling has evolved, and assessing the quality of the glass and decoration.
Most signed Kosta Boda art glass pieces carry an etched or engraved mark on the base reading “Kosta Boda”, typically accompanied by the designer’s name or initials and a pattern or series number. Bertil Vallien pieces, for example, are usually marked with his surname, the Kosta Boda name, and a numerical code identifying the specific piece within its series. Unique series pieces carry individual inscriptions noting the series name and a unique identifying number.
Paper labels were also used across different production periods, including rectangular labels with black ground and silver lettering reading “Handmade / Kosta Crystal Collection / Lead Crystal,” and white-ground labels reading “Kosta Boda / Since 1742.” As with all paper-labelled glass, labels may have been lost over time, so their absence from older pieces does not negate authenticity.
The quality of the glass itself is a reliable guide. Genuine Kosta Boda art glass has a clarity and weight consistent with lead crystal, and hand-painted or hand-blown pieces show the subtle variability of handcraft: no two pieces are precisely identical. Machine-made or mass-produced imitations lack this quality and the individual character that distinguishes genuine studio pieces. For valuable or signed pieces, comparing the marking style and pattern numbers against documented series information provides additional confirmation.
Kosta Boda Art Glass Values
The Kosta Boda secondary market is broad, ranging from accessible vintage pieces to significant works by major artists that appear at international auction houses.
Bertil Vallien’s Unique and limited edition sand-cast sculptures represent the upper end of the market, with major pieces regularly appearing at Bonhams and other auction houses at prices ranging from several hundred to several thousand dollars. His Unique series pieces are individually numbered and described, and provenance documentation adds materially to value. Following his death, Vallien’s work will become a closed body of output, which is likely to support long-term secondary market interest.
Condition, as with all glass, is critical. Chips, cracks, or damage to painted decoration reduce value significantly. Signed pieces in excellent condition with original paper labels where applicable, and accompanied by any original packaging or documentation, achieve the best results.
Frequently Asked Questions About Kosta Boda Art Glass
How do I identify Kosta Boda art glass?
Look for an etched or engraved “Kosta Boda” mark on the base, usually accompanied by the designer’s name or initials and a pattern or series number. Paper labels reading “Kosta Boda / Since 1742” or similar are also authentic markings, though they may have been lost on older pieces. The quality of the glass, clarity, and any handcraft variability are reliable secondary guides.
Which Kosta Boda designers are most collectible?
Bertil Vallien is the most collected, particularly his sand-cast Unique series sculptures, boat forms, and earlier series pieces such as the Boda Zoo and Galaxy Blue. Ulrica Hydman-Vallien’s painted glass, including the Open Minds series, is also consistently sought after. Erik Höglund’s 1950s and 1960s work and Göran Wärff’s minimalist pieces have dedicated collector followings.
What is the Kosta Boda Snowball series?
The Snowball series is a range of distinctive spherical candle holders with a textured bubble surface that refracts light in all directions. They have been produced in a wide range of colours and sizes over several decades. Vintage pieces from the 1970s and 1980s in unusual colourways are the most collectible; the series remains in production, so the base marking and production era are relevant to valuation.
Is Kosta Boda the same as Orrefors?
They are distinct brands with separate histories and design identities, though both have been part of the same corporate group since 1989. Kosta Boda is Sweden’s oldest glassworks, founded in 1742; Orrefors was founded in 1898 and has a separate and equally distinguished art glass tradition. The Orrefors glassworks closed in December 2012, while Kosta Boda continues to operate in Kosta.
Find Kosta Boda Art Glass at Around the Block
Kosta Boda art glass passes through our showroom regularly, and each piece arrives with its own story.
We also carry art glass and crystal figurines from other celebrated makers, including Lalique, Daum, Waterford, and Swarovski. Whether you’re building a collection or bringing a piece in to consign, we’re happy to take a closer look.
Explore our current selection or come by our Toronto showroom to see what’s available.
