A magnesium-bearing variety of morenosite, containing Mg in substitution for Ni up to the 1:1 ratio with Mg, after which the material in the series is epsomite (50% rule).
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
References for Magnesian Morenosite
Reference List:
Palache, Charles, Harry Berman & Clifford Frondel (1944), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Volume I: Elements, Sulfides, Sulfosalts, Oxides. John Wiley and Sons, Inc., New York. 7th edition, revised and enlarged: 517.