Chalcanthite, Melanterite, Römerite

Specimen ID: 91H-5YR

Mineral(s)
Chalcanthite : CuSO4·5H2O
Melanterite : Fe2+(H2O)6SO4·H2O
Römerite : Fe2+Fe3+2(SO4)4·14H2O
Locality
Mindat locality:
Dimensions
20.8cm x 9.5cm x 8cm
Events

Photo added to mindat.org

20.8 x 9.5 x 8.0 cm. This is a bizarre columnar Chalcanthite specimen that is coated by a thin layer of the iron sulfate romerite, through which nests of sharp, bladed melanterite crystals to 6mm in size poke out every which way on all sides. According to museum records and the number on the back of the piece (19977), this dates to the time period as the Vaux expeditions of the 1920s and thus was most likely collected by Sam Gordon, then-curator, on one of the early Vaux expeditions (1st or 2nd). Sam Gordon collected the specimen in 1921 (then on the Vaux expeditions). Ex. Academy of Natural Sciences Philadelphia Collection.
Robert Lavinsky - 18th December 2008

Photo added to mindat.org

20.8 x 9.5 x 8.0 cm. This is a bizarre columnar Chalcanthite specimen that is coated by a thin layer of the iron sulfate romerite, through which nests of sharp, bladed melanterite crystals to 6mm in size poke out every which way on all sides. According to museum records and the number on the back of the piece (19977), this dates to the time period as the Vaux expeditions of the 1920s and thus was most likely collected by Sam Gordon, then-curator, on one of the early Vaux expeditions (1st or 2nd). Sam Gordon collected the specimen in 1921 (then on the Vaux expeditions). Ex. Academy of Natural Sciences Philadelphia Collection.
Robert Lavinsky - 18th December 2008
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