David K. Joyce Minerals

Engineer Mine, Atlin, British Columbia, Stibarsen-Arsenic

The Engineer Mine is also famous for "allemontite" once thought to be a mineral. It has been determined that allemontite is actually a mixture of two minerals -stibarsen and arsenic. These two minerals occur together at the Engineer mine to form interbanded, botryoidal aggregates to make up this unique assemblage. The stibarsen is always silvery, while the arsenic is pitch black. As well, arsenic occurs as the "native" form, with only a little or no stibarsen. Here are some interesting examples of these minerals. All of these specimens were recoved utilizing a metal detector on the Level 1 or "Captain Alexander's" dump. They all resulted from hand-cobbing of ore during the earliest mining activities about 100 years ago.

All prices in Canadian dollars. For payment in US$, deduct 22% or multiply by 0.78.

Click on any of the following thumbnails to view a larger image of the specimen.

Stibarsen-ArsenicEngineer Mine, Atlin, British Columbia, Stibarsen-Arsenic
  • Item #10788
  • Stibarsen-Arsenic
  • 4.6x3.5x2.6 cm
  • Largest Crystal Size: n/a
  • $40.00
  • Engineer Mine
  • Atlin Mining Division, Tagish Lake
    British Columbia, Canada
  • Partially oxidized stibarsen and arsenic in an opening in quartz. you can't see in these photo's but at the one small opening in the piece, you can see the silvery-metallic stibarsen on the arsenic. Interesting piece!
Arsenic-StibarsenEngineer Mine, Atlin, British Columbia, Stibarsen-Arsenic
  • Item #10799
  • Arsenic-Stibarsen
  • 3.1x3.0x2.4 cm
  • Largest Crystal Size: n/a
  • $30.00
  • Engineer Mine
  • Atlin Mining Division, Tagish Lake
    British Columbia, Canada
  • A rich, oxidized specimen showing, mostly, arsenic with some stibarsen, embedded in quartz. Good locality specimen!