Bristol: English Opaque and Colored Glass
Bristol glass refers to the distinctive opaque white, blue, green, and amethyst colored glass produced in and around Bristol, England, from the mid-18th through mid-19th centuries. The city became one of the most important glass-making centers in Britain, and "Bristol blue" has become a generic term for deep cobalt blue glass regardless of its actual origin. Bristol also produced notable porcelain and delftware, but the glass remains the most widely collected category associated with the city name.
History and Production
- 1650s-1700s: Early glass production established in Bristol, taking advantage of the port city's access to raw materials and fuel
- 1745: Excise Act taxes glass by weight, encouraging lighter, more decorative wares
- 1760s-1820s: Peak period for Bristol colored glass production, particularly deep blue, green, and opaque white
- Lazarus Jacobs & Isaac Jacobs: The most celebrated Bristol glass makers, known for superb blue glass with gilded decoration, active 1780s-1830s
- 1850s onward: Production declines as cheaper pressed glass becomes dominant
Types of Bristol Glass
- Bristol blue: Deep cobalt blue glass, the most iconic type; used for decanters, finger bowls, and decorative wares
- Opaque white (milk glass): Dense white glass decorated with painted enamel flowers, chinoiserie, or gilding
- Green glass: Rich emerald green bottles, decanters, and vases
- Amethyst glass: Purple-tinted glass, less common and highly collectible
- Gilded and enameled: Pieces with hand-applied gold borders, labels, or painted scenic decoration
Identification and Authentication
- Color depth: Genuine Bristol blue has a rich, saturated cobalt color distinct from modern reproductions
- Pontil marks: Hand-blown pieces show pontil scars on the base
- Gilding: Period gold decoration shows honest wear; bright, sharp gilding suggests later work
- Weight and feel: Period Bristol glass is relatively heavy and has a satisfying ring when tapped
- Enamel decoration: On opaque white pieces, enamel painting should show brush strokes and period-appropriate motifs
Auction Prices and Market Values
| Category | Typical Range | Exceptional Pieces |
|---|---|---|
| Bristol blue decanters | $100-$400 | $1,500+ for Jacobs signed |
| Bristol blue finger bowls | $50-$150 | $400+ with gilding |
| Opaque white vases (enameled) | $75-$300 | $800+ for fine painting |
| Green glass decanters | $80-$250 | $600+ for labeled examples |
| Amethyst pieces | $100-$500 | $1,200+ |
| Gilt-labeled spirit decanters (set) | $300-$1,200 | $3,000+ for complete sets |
Condition Factors
- Gilding wear: Some gilding loss is expected on genuine period pieces; complete loss greatly reduces value
- Chips and cracks: Any damage to colored glass is highly visible and value-reducing
- Enamel flaking: On opaque white pieces, flaking enamel is common and difficult to repair
- Stopper originality: Decanters should have their original stoppers; replacements reduce value by 30-50%
- Color consistency: Variations in color depth are normal in hand-blown glass
Collecting Tips
- The term "Bristol" is used loosely in the trade; true Bristol-made pieces are rarer than the term suggests
- Isaac Jacobs pieces with signed gilded decoration are the pinnacle of Bristol glass collecting
- Pairs and sets of decanters command significant premiums over singles
- Compare color and construction with museum examples at the Bristol Museum and Art Gallery
- Reproduction Bristol blue glass has been made continuously; study weight, color, and construction details carefully