Sulphosalt, ramdohrite - lillianite group.
Specific gravity: 5.35
Hardness: 3 to 3½
Colour: Dark grey
Common impurities: Cu,Zn,Fe
Andorite occurs in low-temperature polymetallic hydrothermal veins.
At the Itos mine, Bolivia, andorite is associated with cassiterite, arsenopyrite, stannite, zinkenite, tetrahedrite, pyrite, alunite and quartz (HOM).
At Llallagua, Bolivia, andorite is quite rare, but it has been found covered by wavellite, with stannite and pyrite on quartz (MinRec 37.2.126).
At Baia Sprie, Romania, andorite is associated with stibnite, sphalerite, baryte, fluorite, siderite and quartz (HOM).
At Morey, Nevada, USA, andorite is associated with pyrargyrite, stephanite, sphalerite, rhodochrosite and quartz (HOM).
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