certainty of origin : Donated directly by the Author.
author(s) : Shepard
date of publication : 1869
source : Am.Journ.Sci.(47) p.428-429
formula : var de variscite
comments about the origin : coll.Adam No4583 obtenu par Shepard en 1869
catalog number(s) : 17794
This type specimen, kept in the Museum of Ecole des mines de Paris, has been indexed by Dr Guillemin.
(C) BRGM, ENSMP