Mineral: Helvine and Quartz
Locality: Huanggang Mines, Hexigten Banner (Kèshíkèténg Qí), Chifeng (Ulanhad), Inner Mongolia Autonomous Region, China
Dimensions: 20.0 x 12.0 x 14.0 cm

Description: Main crystal size: 4.0 cm Plate of translucent white quartz needles, at the ends of which have developed stacks of polysynthetic tetrahedrons of very brilliant brown helvite MIM number 1371 Photographer: FMI/James Elliott Publication: "Rocks & Minerals: Vol. 98, No.6 Nov/Dec 2023"

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