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 20% or multiply by 0.8.

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!
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.
JarositeSecondary Minerals, Various Locations
  • Item #21934
  • Jarosite
  • 4.6x4.0x3.4 cm
  • Largest Crystal Size: micro
  • $40.00
  • Luning

  • Nevada, USA
  • The front of this specimen is mostly one large area totally covered with sharp, sparkling crystals of jarosite. Lots to look at!
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!
Goethite, ps AnglesiteSecondary Minerals, Various Locations
  • Item #20012
  • Goethite, ps Anglesite
  • 4.4x3.7x2.7 cm
  • Largest Crystal Size: 14mm
  • $75.00
  • 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! t
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 #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
    Mexico
  • 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! t
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. t
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!
AnnabergiteSecondary Minerals, Various Locations
  • Item #21171
  • Annabergite
  • 4.0x3.3x3.5 cm
  • Largest Crystal Size: 2mm
  • $80.00
  • Laurium

  • Greece
  • The vuggy area at the top of this piece has many sprays of deep-emerald green annabergite in it. The matrix appears to have some silvery arsenide mineral specs in it which may be the source of the nickel for the annabergite. Beautiful specimen from a classic, ancient locality!
ChlorargyriteSecondary Minerals, Various Locations
  • Item #21188
  • Chlorargyrite
  • 5.1x4.5x5.0 cm
  • Largest Crystal Size: n/a
  • $85.00
  • Oriziba mine
  • Pinal Co.,
    Arizona, USA
  • A really nice specimen of chlorargyrite from Arizona. The front of this specimen is very vuggy and is lined with yellow chlorargyrite crystals, many very sharp! Excellent specimen from an unusual locality.
PyromorphiteSecondary Minerals, Various Locations
  • Item #21191
  • Pyromorphite
  • 6.5x4.9x4.0 cm
  • Largest Crystal Size: 12mm
  • $75.00
  • Mina San Luis
  • Guasapares
    Chihuahua, Mexico
  • Gorgeous, elongate crystals of lime-green pyromorphite are aesthetically present in this gossan matrix. There also appears to be chalcophanite associated with the pyromorphite. Great looking specimen from an unusual location!
DescloiziteSecondary Minerals, Various Locations
  • Item #21251
  • Descloizite
  • 9.7x8.5x5.5 cm
  • Largest Crystal Size: 13mm
  • $160.00
  • Berg Aukas
  • Grootfontein
    Namibia
  • A superb, cabinet specimen of this beautiful secondary Pg-Zn-V mineral from the locality that had produced some of the best specimens! The piece is mostly descloizite in the base with some iron oxides and the top is covered with spiky, lustrous descloizite crystals. Displays perfectly! R
WulfeniteSecondary Minerals, Various Locations
  • Item #21286
  • Wulfenite
  • 6.0x3.8x3.8 cm
  • Largest Crystal Size: 15mm
  • $140.00
  • Glove Mine
  • Santa Cruz Co.
    Arizona, USA
  • A really nice cluster of green-brown, thin-bladed wulfenite crystals with colourless calcite crystals on them. Looks great! R
MalachiteSecondary Minerals, Various Locations
  • Item #21826
  • Malachite
  • 12.5x13.5x8.0 cm
  • Largest Crystal Size: n/a
  • $125.00
  • Mashamba West Mine
  • Kolwezi, Katanga
    Democratic Republic of Congo
  • This specimen is essentially a malachite cementing of gossan/rock fragments. Mostly malachite! There are two cavities in the malachite. The best one shows a number of weirdly-shaped stalactitic malachite forms that are partially covered with small malachite crystals. Beautiful!
DescloiziteSecondary Minerals, Various Locations
  • Item #22109
  • Descloizite
  • 9.7x6.1x4.2 cm
  • Largest Crystal Size: 10mm
  • $120.00
  • Berg Aukas
  • Grootfontein
    Namibia
  • A gorgeous cluster of this beautiful lead-zinc vanadinate. It is composed of lustrous, brown, pointy crystals all over the top of this specimen which is mostly composed of interlocking descloizite with just a little iron oxide. Excellent!
DescloiziteSecondary Minerals, Various Locations
  • Item #22110
  • Descloizite
  • 9.4x7.4x4.5 cm
  • Largest Crystal Size: 11mm
  • $120.00
  • Berg Aukas
  • Grootfontein
    Namibia
  • Sparkling, lustrous crystals of resinous, brown descloizite totally line two concave areas on the top of this matrix of mostly interlocked descloizite crystals. Lots of small crystals on the bottom, as well. Looks great!
Pyromorphite, BaryteSecondary Minerals, Various Locations
  • Item #22220
  • Pyromorphite, Baryte
  • 6.5x4.2x2.5 cm
  • Largest Crystal Size: 7mm
  • $85.00
  • Les Farges
  • Correze
    France
  • The pyromorphite specimens from Les Farges have been featured in textbooks for many many decades.Not perfect but lots of great crystals. A French Classic and very good example of this mineral. r
SmithsoniteSecondary Minerals, Various Locations
  • Item #22237
  • Smithsonite
  • 8.9x3.9x2.0 cm
  • Largest Crystal Size: n/a
  • $55.00
  • Rush
  • Marion County
    Arkansas, USA
  • A specimen of botryoidal smithsonite from an unusual locality. The smithsonite is tinted yellowish and it is botryoids composed of curved smithsonite crystals.
WulfeniteSecondary Minerals, Various Locations
  • Item #22324
  • Wulfenite
  • 10.5x6.5x1.3 cm
  • Largest Crystal Size: 11mm
  • $160.00
  • Touissit
  • Bou Beker
    Morocco
  • A really nice specimen from this modern day classic locality, famous for yellow wulfenite crystals. The wulfenite is in bladed, beveled yellow crystals that cover most of this piece. Looks great! r