David K. Joyce

Engineer Mine, Atlin, British Columbia, Electrum

I am fortunate to have undertaken a mineral collecting project at the Engineer Mine, in cooperation with BCGold Corp, the owners of the mine. For more about this project, please go to the article on this website in the "Articles" section of this website. Some of the specimens are fairly heavy, since we left lots of rock attached for interest as geological specimens. As a result, extra postage costs may apply. (It won't be too bad!)
Electrum is a mineral that is actually a naturally occurring alloy of gold and silver. It is not an actual mineral since its composition can vary dramatically but naturally occurring alloys of gold and silver are called electrum when the ratio of gold:silver ranges around 50:50. This metallic compound can be recognized due to the much lighter silvery-gold colour when compared to the more common end members, silver and gold. The Engineer Mine is famous for its crystallized electrum which occurs mostly as dendritic aggregates and wires in roscoelite, a vanadium-rich member of the Mica Group. Here are excellent examples!

All prices in Canadian dollars. For payment in US$, deduct 19% or multiply by 0.81.

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

Gold, (Electrum)Engineer Mine, Atlin, British Columbia, Electrum
  • Item #13260
  • Gold, (Electrum)
  • 4.5x1.7x1.7 cm
  • Largest Crystal Size: n/a
  • $110.00
  • Engineer Mine
  • Tagish Lake, nr. Atlin
    British Columbia, Canada
  • A rich, hackly area of electrum is exposed all around one end of this specimen, clearly, due to etching with hydrofluoric acid. Rich1
Gold, (Electrum)Engineer Mine, Atlin, British Columbia, Electrum
  • Item #13258
  • Gold, (Electrum)
  • 8.7x6.7x0.5 cm
  • Largest Crystal Size: n/a
  • $75.00
  • Engineer Mine
  • Tagish Lake, nr. Atlin
    British Columbia, Canada
  • This slice of vein mineralization shows gold concentrated in two areas, as shown in the close-up images. Nice example of high grade from the old Engineer Mine.
Gold, var. Electrum, RoscoeliteEngineer Mine, Atlin, British Columbia, Electrum
  • Item #21839
  • Gold, var. Electrum, Roscoelite
  • 3.8x2.4x0.7 cm
  • Largest Crystal Size: 1mm
  • $65.00
  • Engineer Mine
  • Atlin, Tagish Lake
    British Columbia, Canada
  • Tiny crystal sections of electrum are present in a matrix of, mostly, roscoelite in this sawn specimen. Rich specimens from a classic locality!