Aurostibite

COLOR

White, with a pinkish cream tint by comparison with native antimony. Takes a good polish with no scratches. Tarnishes in air.

REFLECTANCE

Very strong. Slightly lower than antimony. Definitely higher than arsenopyrite or pyrite.

ANISOTROPISM

Isotropic.

TEXTURE

Aurostibite is pratically always associated with gold, antimony or both, for it often occurs by reaction of these two metals. Texture is identical to that observed in maldonite, in contact with gold and bismuth.

ASSOCIATED MINERALS

Gold, antimony, arsenopyrite, stibnite, berthierite.

CRITERIA OF DETERMINATION

Like maldonite, isolated aurostibite is difficult to identify. However, it mae be somewhat easyli identified because of the constant association with gold and antimony. Other criteria are as follows: metallic luster; polishes better than metals. Also its pinkish shade in ordinary light.

Source

ATLAS OF ORE MINERALS (P. Picot and Z. Johan)