Specimen Number31-5-010Alternate Number56-29-1CommentsSeveral thick (to 1") chromite layers in antigorite + opal matrix (see XRD below). The opal peaks are not in most powder diffraction databases, the large broader peak in center of pattern is likely opal.In Teaching CollectionNoMineral(s)chromiteantigoriteopalRock NameCr oreDistrictSalmon FallsMinePillikinExternal LinkMindatGeo-LocationPit no. 5ADeposit TypeAlpine peridotiteGeo-Coords[1] Donated ByUniversity of Wisconsin-Madison Department of Geoscience