David K. Joyce

Secondary Minerals, Various Locations, Page Two

Here are more interesting minerals from the oxidized zones!

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.

Item #13500 Descloizite 2.1x1.4x1.8 cm Largest Crystal Size: 10mm $35.00 Grootfontain Namibia A lustrous cluster of deep brown descloizite crystals. Looks great! Very sharp!	Item #13511 Descloizite, Calcite 12.5x8.0x5.5 cm Largest Crystal Size: 10mm $245.00 Grootfontein Namibia A rather spectacular specimen of descloizite showing two very different habits on the same specimen. On one side, the crystals are deep-brown and very lustrous, while on the other side the crystals are a lighter brown and larger in size. The piece is capped with iron stained, rounded calcite crystals. The old label that accompanies the specimen identifies the locality as "Grootfontein, S.W.Africa". Beautiful and impressive.	Item #13508 Descloizite 4.4x3.4x2.3 cm Largest Crystal Size: 4mm $40.00 Grootfontein Namibia A cluster of dark-brown descloizite crystals with good luster. The cluster has two protuberances of crystals which give it an interesting appearance!	Item #13505 Descloizite 4.5x4.4x2.1 cm Largest Crystal Size: 8mm $40.00 Grootfontein Namibia This is really two specimens in one! On one side, the piece is covered with deep-brown, lustrous, sparkling descloizite crystals. The other side has many larger, lighter brown descloizite crystals of a different habit -more wedge-shaped.
Item #13502 Descloizite 3.2x3.2x2.2 cm Largest Crystal Size: 9mm $40.00 Grootfontein Namibia A mound of very lustrous, sharp descloizite crystals up to 10mm or so in length.	Item #13503 Descloizite 3.7x2.9x2.0 cm Largest Crystal Size: 5mm $35.00 Grootfontein Namibia A lustrous mound of rich-brown descloizite crystals. Nice crystals!	Item #13390 Descloizite 4.7x3.8x0.9 cm Largest Crystal Size: as above $45.00 Berg Aukas Grootfontein Namibia This specimen is a twinned group of descloizite crystals in a tree-like habit. The very tip of the group is missing but the rest of the crystals are intact. Very nice example!	Item #10581 Descloizite 3.9x3.2x2.2 cm Largest Crystal Size: 8mm $75.00 Groofontein Namibia Well formed, blunt, almost cubic crystals of descloizite from the famous. Grootfontein area. That is all of the locality info that I have. The crystals have a good lustre and are associated with many unidentified 1mm white, hexagonal crystals (calcite? cerussite?...). Nice!
Item #10693 Botryogen, Copiapite 6.4x5.7x2.5 cm Largest Crystal Size: n/a $85.00 Quetena Chile A 2.0cm seam of orange botryogen cuts right through this matrix. It appears that the matrix has been fractured and the fractures filled with light blue-green copiapite. Very nice piece!	Item #10698 Botryogen, Copiapite 10.7x6.5x5.5 cm Largest Crystal Size: n/a $85.00 Quetena Chile The top of this piece is covered by an open seam of orange botryogen. There are little bits of copiapite in the sample, as well as an unknown white mineral. Excellent specimen!	Item #16936 Wulfenite 3.2x2.9x1.5 cm Largest Crystal Size: 14mm $40.00 79 Mine Gila Co. Arizona, USA Paper-thin, bright yellow, wulfenite crystals make up this specimen. The cluster is a flower-like arrangement of the paper-thin crystals. Sweet!	Item #16920 Wulfenite, Mimetite 3.1x2.6x1.7 cm Largest Crystal Size: 15mm $45.00 San Francisco Mine Sonora Mexico Really nice cluster of tallow-orange, thin-platy wulfenite crystals held together by fine botryoidal mimetite. The crystals are very interesting and show square cross section with beveled edges. One crystal is a sort of L-shaped with a curved, beveled face. Unique!
Item #20077 Smithsonite, Calcite 8.8x6.1x2.3 cm Largest Crystal Size: n/a $75.00 Choix Sinaloa Mexico A lovely plate of botryoidal, pinkish smithsonite with relict calcite blebs on it. Nice luster! Looks great! t	Item #20081 Smithsonite 6.0x5.2x4.2 cm Largest Crystal Size: n/a $75.00 Santa Amita Mine Choix Sinaloa, Mexico An attractive botryoidal mound of green-blue smithsonite crystals. on skeletal smithsonite matrix. Great-looking specimen. t	Item #20095 Malachite, Cerussite, Pyromorphite 7.5x7.1x3.5 cm Largest Crystal Size: Ma 12mm $85.00 Brown's Prospect Rum Jungle Northern Territory, Australia A plate of botryoidal malachite on pyromorphite garnished with small crystals of cerussite. Interesting paragenesis and a good looking piece! t	Item #20267 Kermesite, Calcite 11.5x8.0x8.4 cm Largest Crystal Size: 35mm $240.00 Dafeng Shanlin Co., Guanxi, Zhuang China A number of sprays of cherry-red, acicular, free-standing kermesite crystals are exposed in a narrow, drusy calcite crystal-lined seam on the front of this matrix. Unusual and different locality for this relatively rare mineral.
Item #20647 Pyromorphite 4.2x2.9x2.5 cm Largest Crystal Size: 13mm $65.00 Yangshuo Mine Guanxi China An aesthetic cluster of light green pyromorphite crystals from this mine. The crystals are unusual in that they have divergent crystals protruding from a main crystal. Have a look! Very interesting and good-looking! t	Item #21189 Stibiconite 13.3x2.6x2.5 cm Largest Crystal Size: as above $120.00 Catorce San Luis Potosi Mexico A superb, superb pseudomorph. This former stibnite crystal appears to have been totally replaced by stibiconite. It has an extremely sharp termination and the stria on the prism faces have been faithfully preserved. There is also a thin veneer of crystallized calcite on parts of the crystal. Classic! Excellent!	Item #21277 Azurite, Malachite 14.5x12.3x5.7 cm Largest Crystal Size: 5mm $425.00 Liufengshan Mine Anhui China An amazing, great-looking example of copper mineralization! The matrix is, essentially, porous, botryoidal, dark-green malachite in which all of the cavities are lined with lustrous, blue, razor-sharp crystals of azurite. Partially sawn base. This is a large cabinet specimen that looks great. R	Item #21595 Vanadinite 5.1x3.1x2.2 cm Largest Crystal Size: 6mm $75.00 J.C. Holmes Claim Patagonia Arizona, USA Vibrant-orange-red vanadinite crystals cover much of this fragment of rock, probably a breccia fragment, originally. The crystals are hexagonal prisms with prominent pyramidal faces. Nice!
Item #21923 Libethenite 5.0x3.0x0.9 cm Largest Crystal Size: micro $35.00 Staustell Cornwall England The top of this plate of granite is covered by, sharp, deep-green crystals of libethenite. Classic old locality!	Item #21974 Olivenite 4.3x4.5x3.6 cm Largest Crystal Size: 1.5mm $65.00 Wheal Gorland St. Day, Cornwall England A vug at the front of this quartz matrix is totally lined with deep, forest green olivenite crystals. Actually, there are a number of other smaller openings, as well, in the quartz, with olivenite crystals. Classic locality!	Item #22038 Erythrite 13.1x8.2x4.5 cm Largest Crystal Size: 3mm $140.00 Mt. Cobalt Cloncurry Australia This is the richest specimen of erythrite that I have handled. The top of this piece is a thick layer/vein of pink-red acicular/fibrous erythrite crystals. From a famous cobalr-rich mineral system. Looks spectacular. R	Item #22155 Pyromorphite 8.6x3.7x5.0 cm Largest Crystal Size: 1mm $65.00 Phoenixville Pennsylvania, USA The top of this silica-rich rock is covered with pyromorphite crystals, the classic colour of pyromorphite from this old mine. Very old, classic American mining location!
Item #22200 Descloizite 9.3x7.2x6.0 cm Largest Crystal Size: 9mm $110.00 Berg Aukas Grootfontein Namibia Wow! A heavy cluster of descloizite crystals from the place that arguably produces the best. This cluster of terminated, deep brown crystals its very nicely for display.	Item #22193 Kermesite, Valentinite, Antimony 1.9x2.2x2.2 cm Largest Crystal Size: k-11mm $65.00 Lac Nicolet SB Mine Ham Sud Quebec, Canada A cluster of very elongated, acicular kermesite crystals protrudes up out of a matrix of native antimony. The top of the matrix was part of an opening lined with bright, complex, antimony crystals, small clusters of stibnite and excellent valentinite crystals.	Item #22395 Azurite 7.0x10.5x6.2 cm Largest Crystal Size: 4mm $120.00 China A rather large specimen of botryoidal azurite! If you look at the the undulating carpet of solid azurite closely, you can see that it is composed of thousands of small crystals. Extremely rich. Sorry, don't know the exact locality but probably Chizhou, Anhui copper mining area. R