Assertion: sulfur | /r/AtLocation | galena
Facets:
Source sentences:
text: In nature, sulfur can be found in compounds like galena and cinnabar, and it may also appear in pure deposits, especially around volcanoes and mineral springs.
text: It is found in many minerals, including galena, iron pyrite, sphalerite, stibnite, cinnabar, Epsom salts, gypsum, celestite, and barite.
text: Usually found in volcanic and sedimentary deposits, sulfur is also found in pyrite, galena, gypsum and barite.