Non-systematic, less-recognized and often unverified syntheses of silicon carbide include:
* César-Mansuète Despretz's passing an electric current through a carbon rod embedded in sand (1849)
* Robert Sydney Marsden's dissolution of silica in molten silver in a graphite crucible (1881)
* Paul Schuetzenberger's heating of a mixture of silicon and silica in a graphite crucible (1881)
* Albert Colson's heating of silicon under a stream of ethylene (1882).