Carving a Stone Oil Lamp — Soapstone Fat Lamp with Wick Channel

Stone oil lamps are among the oldest lighting devices known, with examples carved from soapstone (steatite) dating back over 40,000 years in Upper Palaeolithic Europe and continuing in use among Arctic peoples into the 20th century. Unlike clay oil lamps, stone lamps are virtually indestructible — they cannot crack from thermal shock, they absorb and radiate heat steadily, and they last generations. Soapstone is the ideal material because it rates only 1 to 2 on the Mohs hardness scale, making it soft enough to carve with flint tools, yet it is dense and non-porous, so it holds liquid fat without seeping. The Inuit qulliq lamp demonstrates the pinnacle of this technology: a shallow soapstone bowl filled with rendered seal fat with a wick of dried arctic cotton grass along one edge. This blueprint teaches the fundamental technique of hollowing a soapstone blank into a shallow bowl with a dedicated wick channel, suitable for burning any rendered animal fat (tallow, lard, or fish oil) with a plant-fibre wick.