Hauckite Locality: Sterling Hill , Ogdensburg , Franklin Mining District, Sussex County, New Jersey , USA ( Locality at mindat.org ) Size: thumbnail, 2.6 x 1.7 x 1.1 cm Hauckite A rare validated specimen of the extremely rare mineral species named after Franklin area collector Richard Hauck, consisting of several eye-visible microcrystal clusters on contrasting matrix (pale whitish color), with minor Pyrochroite (Black) in association . Almost seventy new mineral species have been described from the unique Franklin area, and this is one that remains unique to Sterling Hill, to my knowledge. — Photo: Robert M. Lavinsky · CC BY-SA 3.0
Hauckite
Hauckite is an IMA-recognized mineral species in the sulfate class, with the chemical formula Fe³⁺₃Mg₂₄Zn₁₈(SO₄)₄(CO₃)₂(OH)₈₁.
It crystallizes in the hexagonal crystal system.
Key properties: Mohs hardness 2–3; specific gravity 3.02; Yellow to pale yellow streak; Vitreous to slightly pearly luster; optically uniaxial.
IMA symbol Hck, IMA status: approved, named in 1979.
Very rare, found in several different parageneses in a metamorphosed stratiform zinc orebody.
It is found associated with Mooreite, phlogopite, calcite; sussexite, pyrochroite, zincite; chlorophoenicite, calcite;.
The mineral was named to honor Richard Philip Hauck (1935–), mineral collector of Bloomfield, New Jersey, USA.