David K. Joyce Minerals

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 22% or multiply by 0.78.

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

Gold, (Electrum)Engineer Mine, Atlin, British Columbia, Electrum
  • Item #13273
  • Gold, (Electrum)
  • 10.3x6.4x3.2 cm
  • Largest Crystal Size: micro
  • $75.00
  • Engineer Mine
  • Tagish Lake, nr. Atlin
    British Columbia, Canada
  • This interesting vein fragment has many dark areas of roscoelite, most of which has tiny, elongated crystals of electrum embedded in it. Very interesting under the microscope.
Gold, (Electrum)Engineer Mine, Atlin, British Columbia, Electrum
  • Item #13271
  • Gold, (Electrum)
  • 6.9x4.6x6.7 cm
  • Largest Crystal Size: n/a
  • $65.00
  • Engineer Mine
  • Tagish Lake, nr. Atlin
    British Columbia, Canada
  • A quartz vein fragment, sawn on one end, to reveal rich electrum embedded in the quartz. Some nice electrum on the sides, as well.
Gold, (Electrum)Engineer Mine, Atlin, British Columbia, Electrum
  • Item #13263
  • Gold, (Electrum)
  • 5.2x5.4x4.3 cm
  • Largest Crystal Size: n/a
  • $110.00
  • Engineer Mine
  • Tagish Lake, nr. Atlin
    British Columbia, Canada
  • A very rich zone of electrum is shown at one end of this quartz fragment. The electrum appears to be composed of closely grown, elongated crystals of electrum. The richest part is a veinlet of electrum right at the very edge.
Gold, (Electrum)Engineer Mine, Atlin, British Columbia, Electrum
  • Item #13261
  • Gold, (Electrum)
  • 4.9x3.0x2.3 cm
  • Largest Crystal Size: n/a
  • $75.00
  • Engineer Mine
  • Tagish Lake, nr. Atlin
    British Columbia, Canada
  • One end of this specimen of vein quartz shows rich embedded electrum, including a veinlet on the end. Very nice!
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 #13259
  • Gold, (Electrum)
  • 8.5x6.2x0.8 cm
  • Largest Crystal Size: 7mm
  • $110.00
  • Engineer Mine
  • Tagish Lake, nr. Atlin
    British Columbia, Canada
  • Elongated areas of electrum, embedded in the quartz are featured in this brecciated vein sample. Interesting specimen!
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.
CassiteriteEngineer Mine, Atlin, British Columbia, Electrum
  • Item #13283
  • Cassiterite
  • varies cm
  • Largest Crystal Size: n/a
  • $35.00
  • Atlin

  • British Columbia, Canada
  • These specimens consists of 15 cassiterite pebbles recovered from placer claims in the Atlin area of BC. The pebbles are high density and often show banding as is often the case with "Stream Tin" Interesting!
Gold (Electrum)Engineer Mine, Atlin, British Columbia, Electrum
  • Item #13250
  • Gold (Electrum)
  • 3.8x2.2x0.5 cm
  • Largest Crystal Size: micro
  • $65.00
  • Engineer Mine
  • Tagish Lake, nr. Atlin
    British Columbia, Canada
  • This specimen is a slice of quartz vein that shows ribbons of gold cutting through it. As well, there is at least one crystal exposed in the edge of a quartz vug.
Gold, var. Electrum, Quartz, RoscoeliteEngineer Mine, Atlin, British Columbia, Electrum
  • Item #15457
  • Gold, var. Electrum, Quartz, Roscoelite
  • 10.0x8.5x5.2 cm
  • Largest Crystal Size: n/a
  • $85.00
  • Engineer Mine
  • Tagish Lake, nr. Atlin
    British Columbia, Canada
  • This specimen is a mass of vuggy quartz with so,e calcite filling some of the vugs while others are open and lined with quartz crystals. Of interest are the patches of dark roscoelite that contain wiry forms of electrum. If you look closely at the roscoelite, you can see the electrum protruding as wires and masses. Classic Engineer high-grade!