A pair of Blue John lanterns, c.1890, offered by Kendall House Antiques for £7500.

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Blue John, the soft, semi-precious mineral mined only in Derbyshire, reached the height of its popularity in the 19th century. It was used for ornamental purposes, and was made into jewellery, vases, tables and even the windows of some stately homes.

Kendall House Antiques of Chipping Campden offers a pair of Blue John lanterns, c.1890, for £7500. The gothic revival lanterns with Millers Vein panels are probably the work of RG Lomas.

When they were discovered recently they were in original condition with some of the panels broken or missing.

The lanterns were taken to Treak Cliff Cavern where replacement panels were mined and prepared and the lanterns are offered with ceiling roses, their original hanging chains and bulb holder.