David K. Joyce

Secondary Minerals, Various Locations

Secondary minerals are thos that form from the decomposition of primary minerals due to the action of water, oxygen and other weathering agents. For example, the upper parts of copper sulphide deposits usually react with oxygen to alter primary copper sulphides into copper oxides, carbonates and sulphates. These latter minerals are secondary minerals. Here are some great 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.

Malachite, CupriteSecondary Minerals, Various Locations
  • Item #14415
  • Malachite, Cuprite
  • 11.7x7.4x4.8 cm
  • Largest Crystal Size: 3mm
  • $110.00
  • Etoile de Congo Mine
  • Katanga
    Democratic Republic of Congo
  • This specimen is totally covered with sharp, dark green malachite crystals over a core of malachite and deep red cuprite. The cuprite is not visible except where the plate broke away from the rest of the orebody on one end and the underside. Lots of excellent malachite crystals! Displays well.
DioptaseSecondary Minerals, Various Locations
  • Item #17849
  • Dioptase
  • 7.5x5.5x4.1 cm
  • Largest Crystal Size: 0.5mm
  • $40.00
  • Salome
  • Yuma co.
    Arizona, USA
  • The front-top of this piece has an opening lined with tiny, deep, emerald green, sparkling dioptase crystals. An old F. Cureton & Sons label accompanies the specimen. Unusual location. Displays perfectly!
PyromorphiteSecondary Minerals, Various Locations
  • Item #12872
  • Pyromorphite
  • 9.3x7.0x6.5 cm
  • Largest Crystal Size: 12mm
  • $60.00
  • Ems

  • Germany
  • A few brownish pyromorphite crystals are scattered on the top of this sandstone matrix. Most of the crystals are damaged, however. I've put it on the site since it is a unique, classic locality. Looks good, regardless!
ParatacamiteSecondary Minerals, Various Locations
  • Item #13373
  • Paratacamite
  • 8.6x4.4x2.0 cm
  • Largest Crystal Size: 1mm
  • $55.00
  • San Francisco Mine
  • Sierra Gorda
    Chile
  • Excellent, sharp, dark green crystals of paratacamite are scattered, in clusters, across the top of this specimen. Excellent!
ParatacamiteSecondary Minerals, Various Locations
  • Item #13372
  • Paratacamite
  • 4.8x4.7x4.6 cm
  • Largest Crystal Size: micro
  • $30.00
  • San Francisco Mine
  • Sierra Gorda
    Chile
  • Sharp, dark green paratacamite crystals are scattered down the center of this specimen.
PyromorphiteSecondary Minerals, Various Locations
  • Item #13400
  • Pyromorphite
  • 3.7x3.3x1.8 cm
  • Largest Crystal Size: 14mm
  • $35.00
  • Broken Hill Mine
  • New South Wales
    Australia
  • A cluster of unusual gray-coloured, elongated, interlocking pyromorphite crystals from the deposit that spawned the largest mining company in the world!
CornetiteSecondary Minerals, Various Locations
  • Item #13385
  • Cornetite
  • 5.3x4.2x1.8 cm
  • Largest Crystal Size: micro
  • $35.00
  • Manto Russo Mine
  • Salado
    Chile
  • Lots of cavities in this copper-rich gossan are lined with deep-blue cornetite crystals.
MalachiteSecondary Minerals, Various Locations
  • Item #14414
  • Malachite
  • 10.5x8.0x6.5 cm
  • Largest Crystal Size: 2mm
  • $65.00
  • Etoile de Congo Mine
  • Katanga
    Democratic Republic of Congo
  • This specimen is kind of a hollow geode of deep green malachite embedded in a lighter coloured matrix. The interior of the geode is lined with small, sparkling crystals of malachite and they are set on a rind of solid malachite about 5mm thick. Great looking specimen from a classic locality.
MalachiteSecondary Minerals, Various Locations
  • Item #14957
  • Malachite
  • 4.3x3.0x3.1 cm
  • Largest Crystal Size: n/a
  • $35.00
  • Lornex Mine (Highland Valley Copper)
  • Logan Lake
    British Columbia, Canada
  • All of the open spaces in this quartz breccia are lined with dark green botryoidal malachite. This is a HUGE copper-molybdenum mine in the Highland Valley of British Columbia that was formed by the amalgamation of Valley Copper Mine, Highmont Mine and Lornex Mine. When they mine the near surface portions of the deposit, they sometimes encounter secondary mineralization.
DescloiziteSecondary Minerals, Various Locations
  • Item #16324
  • Descloizite
  • 3.4x2.8x2.2 cm
  • Largest Crystal Size: 11mm
  • $55.00
  • Grootfontein
    Namibia
  • A "screamer" specimen of descloizite from the classic locality. The crystals are a lustrous, dark brown and are arranged in a wonderful cluster. Classic!
WulfeniteSecondary Minerals, Various Locations
  • Item #16916
  • Wulfenite
  • 7.8x5.7x3.2 cm
  • Largest Crystal Size: 12mm
  • $150.00
  • Rowley Mine
  • Maricopa County
    Arizona, USA
  • A superb cluster of lustrous wulfenite crystals from an old Arizona classic locality. The specimen shows tabular, beveled wulfenite crystals ranging in colour from fairly yellow to brownish. The wulfenites have formed on, what looks like, a bed of small botryoidal mimetite crystals. Displays very well From front!
Azurite, QuartzSecondary Minerals, Various Locations
  • Item #19353
  • Azurite, Quartz
  • 9.7x4.0x5.5 cm
  • Largest Crystal Size: n/a
  • $45.00
  • Pui Pui
    New Zealand
  • This is an unusual specimen from a location that probably has very little documented about it! A friend collected it near Pui Pui. The nodules appear to be formed from interlocking quartz crystals and copper secondary minerals, particularly azurite and malachite. No analyses have been done. Interesting!
Goethite, ps AnglesiteSecondary Minerals, Various Locations
  • Item #20012
  • Goethite, ps Anglesite
  • 4.4x3.7x2.7 cm
  • Largest Crystal Size: 14mm
  • $85.00
  • Kintore Open Cut
  • Broken Hill, NSW
    Australia
  • This is an unusual one!! This specimen shows dark brown, velvety casts of goethite after anglesite, loyally preserving the shape of the anglesite crystals. Interestingly, the casts are often partially full of much smaller blades of colourless to white cerussite. Displays well. Excellent!
Cuprite, GoethiteSecondary Minerals, Various Locations
  • Item #20270
  • Cuprite, Goethite
  • 9.0x7.5x8.0 cm
  • Largest Crystal Size: 2.5mm
  • $225.00
  • Sepon Mine
  • Vilabouly, Savannakhet
    Laos
  • A large fragment of goethite that is riddled with cavities ALL lined with bright, lustrous, ruby-red cuprite crystals. Very nice specimen of cuprite from an unusual location.
CupriteSecondary Minerals, Various Locations
  • Item #20290
  • Cuprite
  • 5.6x4.9x4.9 cm
  • Largest Crystal Size: 4mm
  • $85.00
  • Sepon Mine
  • Vilabouly, Savannakhet
    Laos
  • A gossanous matrix that has oodles of open spaces lined with deep red, sharp, octahedral crystals of cuprite. Excellent specimen from this unusual location.
KermesiteSecondary Minerals, Various Locations
  • Item #20293
  • Kermesite
  • 9.1x7.4x5.7 cm
  • Largest Crystal Size: 30mm
  • $75.00
  • Dafeng
  • Shanlin Co., Guanxi
    Zhuang, China
  • This specimen shows deep-red, acicular crystals of this unusual mineral on a calcite coated fracture surface. The kemesite needles are present in a long opening and embedded or partially embedded in the calcite. Nice example from an unusual locality!
CupriteSecondary Minerals, Various Locations
  • Item #20296
  • Cuprite
  • 7.1x6.3x2.4 cm
  • Largest Crystal Size: 2mm
  • $75.00
  • Sepon Mine
  • Vilabouly, Savannakhet
    Laos
  • Lots of gemmy, red cuprite crystals line vugs in goethite/gossan matrix. Lots to look at!
KermesiteSecondary Minerals, Various Locations
  • Item #20299
  • Kermesite
  • 7.1x4.9x5.6 cm
  • Largest Crystal Size: 6mm
  • $85.00
  • Dafeng
  • Shanlin Co., Guanxi
    Zhuang, China
  • Lots of divergent, tufts of red kermesite are exposed on this fracture. Rich, instructive specimen of this unusual mineral.
KermesiteSecondary Minerals, Various Locations
  • Item #20301
  • Kermesite
  • 9.2x6.0x4.9 cm
  • Largest Crystal Size: 14mm
  • $120.00
  • Dafeng
  • Shanlin Co., Guanxi
    Zhuang, China
  • A very rich, showy specimen of deep-red, acicular kermesite, exposed on a fracture across the front of this piece. Wow!
SmithsoniteSecondary Minerals, Various Locations
  • Item #20335
  • Smithsonite
  • 7.3x5.0x3.4 cm
  • Largest Crystal Size: n/a
  • $65.00
  • San Antonio Mine
  • Santa Eulalia, Chihuahua
    Canada
  • A plate of luscious, grey but lustrous smithsonite from this famous old locality. Might even look better if it was standing vertically instead of horizontally.
PyromorphiteSecondary Minerals, Various Locations
  • Item #20634
  • Pyromorphite
  • 5.6x3.7x3.3 cm
  • Largest Crystal Size: 1mm
  • $45.00
  • Huari-Huari mine
  • Potosi
    Bolivia
  • The front/top of this specimen is covered with small, yellow-green pyromorphite crystals. Unusual location!
PyromorphiteSecondary Minerals, Various Locations
  • Item #20635
  • Pyromorphite
  • 4.2x2.5x2.4 cm
  • Largest Crystal Size: 4mm
  • $65.00
  • Huari-Huari mine
  • Potosi Dept.
    Bolivia
  • This specimen is partially covered with light, creamy-green pyromorphite crystals. The crystals are curved and tapered and are reminiscent of "campylite" crystals from the U.K., except they are pyromorphite of a different colour! Nice!
VanadiniteSecondary Minerals, Various Locations
  • Item #20638
  • Vanadinite
  • 4.6x3.4x1.6 cm
  • Largest Crystal Size: 7mm
  • $85.00
  • Keban Dist.
  • Elazig
    Turkey
  • Very nice cluster of disc-like vanadnite crystals from this unusual location. Light brow-beige hexagonal-shaped crystals. Some of the crystals have a secondary growth of tiny crystals of a different hue on the sides of them.
HemimorphiteSecondary Minerals, Various Locations
  • Item #20758
  • Hemimorphite
  • 3.6x2.5x2.7 cm
  • Largest Crystal Size: n/a
  • $75.00
  • Whytes Cleuch
  • Wanlockhead
    Scotland
  • A wonderful specimen of light blue, botryoidal hemimorphite from this famous old locality. We just don't see these very often!
Cuprite, var. ChalcotrichiteSecondary Minerals, Various Locations
  • Item #20759
  • Cuprite, var. Chalcotrichite
  • 4.2x2.6x2.0 cm
  • Largest Crystal Size: 3mm
  • $65.00
  • Cole Shaft
  • Bisbee, Cochise County
    Arizona, USA
  • There are a number of areas of bright red, reticulated cuprite crystals on this gossan matrix. Such an interesting crystal habit of cuprite!
Azurite, MalachiteSecondary Minerals, Various Locations
  • Item #20761
  • Azurite, Malachite
  • 2.7x2.2x1.7 cm
  • Largest Crystal Size: 7mm
  • $55.00
  • Copper Queen Shaft
  • Bisbee, Cochise County
    Arizona, USA
  • A very nice specimen showing a cluster of deep blue azurite crystals associated with fibrous malachite. The Copper Queen Mine was a large famous copper mine at Bisbee and is well known for azurite specimens.
WulfeniteSecondary Minerals, Various Locations
  • Item #20935
  • Wulfenite
  • 9.1x6.9x8.0 cm
  • Largest Crystal Size: 6mm
  • $140.00
  • Red Cloud Mine
  • La Paz Co.
    Arizona, USA
  • OK, it is nor a "screamer" like we see in the Mineralogical Record but it is a very nice wulfenite specimen with the characteristic deep red, tabular crystals that we love from the Red Cloud Mine. A couple are bruised but most are just fine!
TarbuttiteSecondary Minerals, Various Locations
  • Item #20990
  • Tarbuttite
  • 8.4x6.8x4.7 cm
  • Largest Crystal Size: 7mm
  • $140.00
  • Skorpion Mine

  • Namibia
  • The top of this iron-gossan matrix is mostly covered with tarbuttite crystals. The crystals are not individual crystals but sort of composite crystals. The sub-crystals that make up the composite crystals have have sharp terminations and bevelled edges-faces. Some of the crystals are contacted from being in contact with the rock or minerals on the other side of the opening but many are excellent!