One of the leading glass makers of the early 19th century classical revival in Bohemia was Count Von Buquoy, who, in 1817, successfully produced an opaque black glass that resembled Josiah Wedgwood's black basalt stoneware.
When wet, the basalt changes colour from silvery grey to gleaming black.
With walls of black basalt and ice rising 300 metres on each side of the narrow channel, this impression - of cruising through a high mountain valley - is not far from the truth.
On one face of the stone, a tablet of extremely hard black basalt , there is a long trilingual inscription; the three texts begin written one above other.
The fine-grained basalt stoneware reflected Wedgwood's Neoclassicism.
Instead there was just a headstone of black basalt .
Some are made up of dense, black, homogeneous basalt , with no visible mineral grains.
At ground level, a bistro and book shop have been elbowed aside to create a senselessly spacious foyer, floored in black basalt .
Further east is Diyarbakir, a sultry place, where groups of Kurds lurk on the street corners and the black basalt of the walls and the cobbles fill the alleys with its funereal tones.
Wedgwood's basalt , a hard, black, stone-like material known also as Egyptian ware or basaltes ware, was used for vases, candlesticks, and realistic busts of historical figures.