Quote:
Originally Posted by Kax
But you can make basalt cloth with early-Victorian-era technology, if you know how.
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According to wiki, "The manufacture of basalt fiber requires the melting of the crushed and washed basalt rock at about 1,500 °C (2,730 °F). The molten rock is then extruded through small nozzles to produce continuous filaments of basalt fiber." That is not Victorian-era tech, it's not really practical much before when it was actually first attempted (1923).