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Yes reading is fundamental. From your linked article:Anther option if cinnabar is toxic at https://science.howstuffworks.com/environmental/earth/geology/cinnabar.htm
In cinnabar's natural mineral and pigmented form, it's not dangerous. However, when temperatures rise, it releases a mercury vapor which can be toxic if inhaled. "Mercury is toxic, but as long as the cinnabar isn't heated, the mercury is locked by the sulfur, making cinnabar low in toxicity," Ottaway explains.
Still, anyone handling any mineral, especially cinnabar, should wash their hands and exercise caution. "Sometimes cinnabar is found with droplets of native mercury, in its pure form on the surface and should not be handled because native mercury is easily absorbed by the body and is toxic," Ottaway says.
Also, cinnabar shouldn't be cut or ground without water to prevent the inhalation of particles, Ottaway adds. "Ground cinnabar should be handled with care, although ingesting small amounts is unlikely to cause harm because mercury sulfide just passes through your body unaltered," she says.