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Thorogummite: Th(SiO4)1-x(OH)4x
Comments: Yellow-tan resinous thorogummite with calcite. Location: Fort Dauphin, Toliara, Madagascar. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Comments: Pale tan to yellowish thorogummite pseudomorphous after thorite in matrix. Location: Fort Dauphin (Tôlanaro) area, Toliara (Tuléar) Province, Madagascar. Scale: Picture size 5 mm. © Paul M. Schumacher