certainty of origin : Donated directly by the Author.
author(s) : Adam
date of publication : 1869
source : tabl.Min.p.27
formula : steatite
comments about the origin : coll.Adam No3217
catalog number(s) : 13138
This type specimen, kept in the Museum of Ecole des mines de Paris, has been indexed by Dr Guillemin.
(C) BRGM, ENSMP