David K. Joyce

REDUCED -Various International, 40 Percent Off

Deduct 40% from the listed price and an additional 20% for payment in US$!

All prices in Canadian dollars. For payment in US$, deduct 18% or multiply by 0.82.

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

SchorlREDUCED -Various International, 40 Percent Off
  • Item #14426
  • Schorl
  • 3.4x3.3x2.9 cm
  • Largest Crystal Size: 31mm
  • $35.00
  • Erongo

  • Namibia
  • A cluster of pitch-black, doubly terminated schorl crystals from this modern day classic area. The schorl crystals are triangular in cross section, hemimorphic and slightly etched in places. Nice sample!
EpidoteREDUCED -Various International, 40 Percent Off
  • Item #13298
  • Epidote
  • 6.3x4.8x5.6 cm
  • Largest Crystal Size: 25mm
  • $110.00
  • Knappenwand
  • Obersulbachtel
    Austria
  • This piece of massive epidote has an opening in the middle that has many lustrous epidote crystals that bridge from one side to the other. Classic!
BariteREDUCED -Various International, 40 Percent Off
  • Item #14328
  • Barite
  • 3.8x2.9x3.2 cm
  • Largest Crystal Size: 5mm
  • $35.00
  • Tsumeb

  • Namibia
  • A rounded mass of tightly packed barite crystals that appears to have formed in clay or similar environment. An indiscernible catalogue number id painted on the base. Interesting and unusual!
PyromorphiteREDUCED -Various International, 40 Percent Off
  • 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!
Chalcocite, PyriteREDUCED -Various International, 40 Percent Off
  • Item #13457
  • Chalcocite, Pyrite
  • 3.2x3.5x1.7 cm
  • Largest Crystal Size: 3mm
  • $25.00
  • Tsumeb

  • Namibia
  • Lots of fairly sharp chalcocite crystals are scattered around this quartz-chalcocite matrix. Lots to look at.
DatoliteREDUCED -Various International, 40 Percent Off
  • Item #13411
  • Datolite
  • 5.1x4.1x3.7 cm
  • Largest Crystal Size: 22mm
  • $35.00
  • Charcas
  • San Luis Potosi
    Mexico
  • Very nice cluster of light green, sharp, lustrous datolite crystals. A little No associated minerals, just datolite!
DatoliteREDUCED -Various International, 40 Percent Off
  • Item #13412
  • Datolite
  • 5.6x5.6x2.4 cm
  • Largest Crystal Size: 31mm
  • $40.00
  • Charcas
  • San Luis Potosi
    Mexico
  • A very nice cluster of light green, lustrous datolite crystals with a little included chalcopyrite. Nice miniature!
ParatacamiteREDUCED -Various International, 40 Percent Off
  • 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!
Cassiterite, Tourmaline, QuartzREDUCED -Various International, 40 Percent Off
  • Item #13328
  • Cassiterite, Tourmaline, Quartz
  • 9.2x4.2x3.0 cm
  • Largest Crystal Size: 10mm
  • $65.00
  • San Antonio Mine
  • Chambillaya, Quime, Inquisivi, La Paz
    Bolivia
  • Extremely sharp, well formed and lustrous cassiterite crystals are scattered amongst tourmaline impregnated quartz crystals on this specimen. Displays particularly well from the side.
MalachiteREDUCED -Various International, 40 Percent Off
  • Item #14414
  • Malachite
  • 10.5x8.0x6.5 cm
  • Largest Crystal Size: 2mm
  • $120.00
  • 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.
CalciteREDUCED -Various International, 40 Percent Off
  • Item #10314
  • Calcite
  • 8.8x6.8x2.7 cm
  • Largest Crystal Size: as above
  • $75.00
  • Dalen-Kjorholt Mine, Level 152
  • Brevik
    Norway
  • A strange-looking aggregate of very flattenned rhombohedra of calcite. The crystals have a clear inner zone that is kind of curved with ci=urved growth features. They have a frosted outer zone that is more classic with straighter rhombohedral faces. Slight bruising. Unique!
CalciteREDUCED -Various International, 40 Percent Off
  • Item #10316
  • Calcite
  • 7.8x6.5x4.5 cm
  • Largest Crystal Size: 37mm
  • $80.00
  • Dalen-Kjorholt Mine, Level 152
  • Brevik
    Norway
  • A matrix cluster of very thin, flattened rhombohedra of calcite. There are several generation of calcit present, including a thick, tabular early growth, wierd, curved, clear middle growth and a frosted, outer sharp growth showing rhombohedral and pinacoid forms. Interesting, as well as good-looking!
DanburiteREDUCED -Various International, 40 Percent Off
  • Item #10326
  • Danburite
  • 6.1x5.0x2.5 cm
  • Largest Crystal Size: 12mm
  • $35.00
  • Alto Chapare
  • Cochambamba Dept
    Bolivia
  • This is a great looking specimen! A very ell-formed danburite crystal is nicely exposed on the front of this matrix which has a bluish tinge to it. The chisel-shaped crystal is lustrous and sharp. Very good!
DanburiteREDUCED -Various International, 40 Percent Off
  • Item #10329
  • Danburite
  • 8.5x6.3x2.3 cm
  • Largest Crystal Size: 10mm
  • $25.00
  • Alto Chapare
  • Cochambamba Dept
    Bolivia
  • A very sharp, lustrous crystal of danburite is exposed at the front of this chalky matrix. Nice crystal!
DanburiteREDUCED -Various International, 40 Percent Off
  • Item #10330
  • Danburite
  • 6.8x7.8x6.0 cm
  • Largest Crystal Size: 21mm
  • $40.00
  • Alto Chapare
  • Cochambamba Dept
    Bolivia
  • A larger, lustrous, slightly malformed crystal of danburite is exposed at the front of this matrix. Other crystals exposed in the piece elsewhere.
DescloiziteREDUCED -Various International, 40 Percent Off
  • 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!
HematiteREDUCED -Various International, 40 Percent Off
  • Item #10619
  • Hematite
  • 8.2x4.7x3.7 cm
  • Largest Crystal Size: 18mm
  • $75.00
  • Rio Marina
  • Elba
    Italy
  • A thick plate of hematite showing sharp, composite crystals on the top and part of the bottom. Old timer!
CalciteREDUCED -Various International, 40 Percent Off
  • Item #12066
  • Calcite
  • 6.7x6.1x4.5 cm
  • Largest Crystal Size: 20mm
  • $40.00
  • Tsumeb

  • Namibia
  • This specimen is a cluster of creamy-white calcite crystals. The crystals are lustrous and show trigonal symmetry. Sharp!
Botryogen, CopiapiteREDUCED -Various International, 40 Percent Off
  • 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!
Botryogen, CopiapiteREDUCED -Various International, 40 Percent Off
  • 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!
MimetiteREDUCED -Various International, 40 Percent Off
  • Item #17815
  • Mimetite
  • 8.2x6.0x5.4 cm
  • Largest Crystal Size: 9mm
  • $75.00
  • Tsumeb Mine
  • Tsumeb
    Namibia
  • Single crystals and radiating clusters of orangey mimetite are intergrown with iron oxides and quartz breccia fragments to make up the entirety of this specimen. The mimetite crystals are tapered, hexagonal crystals and have good luster unless they are intergrown with the iron oxides. Very good example of this mineral.
CalciteREDUCED -Various International, 40 Percent Off
  • Item #11254
  • Calcite
  • 9.1x6.2x2.5 cm
  • Largest Crystal Size: 24mm
  • $30.00
  • Tsumeb

  • Namibia
  • A plate of pure white scalenohedra of calcite. One damaged crystal in the middle that it not really noticeable.
CalciteREDUCED -Various International, 40 Percent Off
  • Item #11258
  • Calcite
  • 6.8x3.4x2.6 cm
  • Largest Crystal Size: 16mm
  • $30.00
  • Tsumeb

  • Namibia
  • Lots of interestingly twinned, clear, colourless calcite crystals on this specimen from Tsumeb. The calcite crystals have little rounded patches of a iron or clay mineral here and there. A little damage. The crystals are an unusual habit!
CalciteREDUCED -Various International, 40 Percent Off
  • Item #12861
  • Calcite
  • 4.0x2.8x2.4 cm
  • Largest Crystal Size: as above
  • $25.00
  • Tsumeb

  • Namibia
  • A stepped, white-colourless calcite crystal with no other associated minerals. The lustre is very good and the crystal shows only the rhombohedral form with a minor pinacoidal modification.
CalciteREDUCED -Various International, 40 Percent Off
  • Item #12862
  • Calcite
  • 3.9x3.6x2.8 cm
  • Largest Crystal Size: 29mm
  • $30.00
  • Tsumeb

  • Namibia
  • Three rhombs of white calcite are clustered together in this nice specimen. Attached to hematite-stained matrix on back. Looks good!
Cuprite, DolomiteREDUCED -Various International, 40 Percent Off
  • Item #14353
  • Cuprite, Dolomite
  • 7.8x5.4x4.0 cm
  • Largest Crystal Size: 4mm
  • $65.00
  • Tsumeb

  • Namibia
  • A cluster of fairly sharp cuprite crystals is situated on the left side of this specimen on a bed of what I think are white dolomite crystals. There is one other cuprite crystal tucked away between some carbonate crystals. The cuprite crystals have tiny green crystals on them which I assume are malachite. Nice!
Mimetite, CalciteREDUCED -Various International, 40 Percent Off
  • Item #14356
  • Mimetite, Calcite
  • 7.4x6.0x4.6 cm
  • Largest Crystal Size: c-3mm, m-3mm
  • $60.00
  • Tsumeb

  • Namibia
  • This certainly appears to be a calcite specimen but the open area below the white calcite has very nice yellow, bow-ties and sprays of yellow mimetite, which I think trumps the ordinary, white rhombs of calcite. Interesting piece!
EpidoteREDUCED -Various International, 40 Percent Off
  • Item #16779
  • Epidote
  • 2.2x2.4x0.8 cm
  • Largest Crystal Size: as above
  • $40.00
  • Naukluft

  • Namibia
  • A superb, single crystals from Namibia. Very dark green and very lustrous! Excellent thumbnail!
AdamiteREDUCED -Various International, 40 Percent Off
  • Item #16792
  • Adamite
  • 5.7x4.4x4.4 cm
  • Largest Crystal Size: 8mm
  • $45.00
  • Ojuela Mine
  • Mapimi
    Mexico
  • The shallow vug on the top of this specimen is largely lined with light green composite adamite crystals. Classic!
QuartzREDUCED -Various International, 40 Percent Off
  • Item #16771
  • Quartz
  • 11.0x9.2x6.0 cm
  • Largest Crystal Size: 106mm
  • $95.00

  • Brazil
  • A really nice-looking cluster of quartz crystals featuring one particularly one larger 100+mm long, and stout crystal. Displays very well!
QuartzREDUCED -Various International, 40 Percent Off
  • Item #16772
  • Quartz
  • 10.8x7.1x7.5 cm
  • Largest Crystal Size: 10.5
  • $80.00

  • Brazil
  • A cluster of three stout, clear quartz crystals. Slight bruising. Diplays very well!
Arsenopyrite, IlvaiteREDUCED -Various International, 40 Percent Off
  • Item #16756
  • Arsenopyrite, Ilvaite
  • 5.2x3.9x3.5 cm
  • Largest Crystal Size: ilv-38mm, ars-15mm
  • $65.00
  • Huanggang mine
  • Chifeng, Inner Mongolia
    China
  • An interesting combination of a cluster of ilvaite crystals with an arsenopyrite crystal on one side.
CopperREDUCED -Various International, 40 Percent Off
  • Item #19091
  • Copper
  • 1.6x1.1x0.7 cm
  • Largest Crystal Size: as above
  • $30.00
  • Emke Mine
  • Onganja
    Namibia
  • A beautiful dendrite of native copper crystals from this classic copper mining area.
WulfeniteREDUCED -Various International, 40 Percent Off
  • Item #17872
  • Wulfenite
  • 13.1x11.3x6.3 cm
  • Largest Crystal Size: 7mm
  • $95.00
  • Mibladen
    Morocco
  • A large plate that has many, yellow square crystals of wulfenite in protected areas. Classic, closed Moroccan locality.
MimetiteREDUCED -Various International, 40 Percent Off
  • Item #20910
  • Mimetite
  • 14.8x11.5x4.5 cm
  • Largest Crystal Size: 4mm
  • $75.00

  • Mexico
  • Unfortunately, I don't have specific locality info for this piece. Nice mimetite crystals, though, with some associated calcite.
HemimorphiteREDUCED -Various International, 40 Percent Off
  • Item #20913
  • Hemimorphite
  • 11.9x8.7x4.9 cm
  • Largest Crystal Size: 8mm
  • $55.00
  • Ojuela Mine
  • Mapimi, Durango
    Mexico
  • Really nice cluster of hemimorphite from this world famous, prolific producer of secondary mineral specimens. The hemimorphite crystals are colourless, transparent, bladed crystals. Some white calcite rhombs suspended in the hemimorphites. Nice small cabinet specimen.
WulfeniteREDUCED -Various International, 40 Percent Off
  • Item #20915
  • Wulfenite
  • 18.3x12.5x6.7 cm
  • Largest Crystal Size: 10mm
  • $120.00
  • Erupcion Mine
  • Ahumada, Chihuahua
    Mexico
  • This large cabinet specimen has a concave area at the front top that is largely lined with orangey, tabular wulfenite crystals. Displays well!