An intrinsic feature of the Liberty Style was the decorative use of gemstones and enamelwork, and the facing of wall mirrors with repousse copperwork, into which were often set plaques of turquoise enamel or rich blue Ruskin Pottery 'buttons'. Furniture was also set with copper panels and leaded lights of clear and stained glass. Both pewter and silver were ornamented with enamel, and many pieces such as bowls and vases were fitted with liners of deep green glass made by James Powell & Sons of Whitefriars, London, or Clutha glass (the word derives from the old Scottish for 'cloudy') which was made by James Couper & Sons of Glasgow. It is delicate, usually pale green, yellow or amber in colour, with variegated bubbles and streaks, and sometimes patches of aventurine. (Levy, p. 32)
References
Levy, Mervyn. Liberty Style, The Classic Years, 1798-1910. New York: Abrams, 1986.
Last modified November 1999