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 23% or multiply by 0.77.

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

Topaz, QuartzREDUCED -Various International, 40 Percent Off
  • Item #13302
  • Topaz, Quartz
  • 7.5x5.7x7.0 cm
  • Largest Crystal Size: 12mm
  • $170.00
  • Schneckenstein
  • Kielberg, Vogtland, Saxony
    Germany
  • Here is an old classic! This thick plate of layered rock has two superb topaz crystals on the top amongst many colourless quartz crystals. The topaz crystals are a very light yellowish colour which makes them easy to see amongst the quartz. Very nice!
Proustite, polybasiteREDUCED -Various International, 40 Percent Off
  • Item #3863
  • Proustite, polybasite
  • 4.3x2.5x2.4 cm
  • Largest Crystal Size: 3mm
  • $65.00
  • Imiter Mine, Imiter District
  • Djebel Saghro (Jbel Saghro), Ouarzazate Province
    Morocco
  • Some thick, deep red, well formed proustite crystals are nicely perched on this matrix of galena and rock. There are some feathery polybasite crystals present, as well.
Proustite, PolybasiteREDUCED -Various International, 40 Percent Off
  • Item #3872
  • Proustite, Polybasite
  • 5.1x4.4x2.8 cm
  • Largest Crystal Size: 1.5mm
  • $70.00
  • Imiter Mine, Imiter District
  • Djebel Saghro (Jbel Saghro), Ouarzazate Province
    Morocco
  • Lots of beautiful, cherry-red proustite crystals are scattered around this cavernous, rotten galena matrix. There are also some very good polybasite crystals present.
Sphalerite, PyriteREDUCED -Various International, 40 Percent Off
  • Item #4246
  • Sphalerite, Pyrite
  • 4.5x2.8x1.8 cm
  • Largest Crystal Size: 17mm
  • $25.00
  • Naica
  • Chihuahua
    Mexico
  • A cluster of sphalerite crystals with a 17mm crystal sitting up nicely in the centre. A nice pyritohedral pyrite crystal is positioned just in front of the sphalerite. Nice looking!
Sphalerite, PyriteREDUCED -Various International, 40 Percent Off
  • Item #4247
  • Sphalerite, Pyrite
  • 3.6x2.9x3.1 cm
  • Largest Crystal Size: 17mm
  • $25.00
  • Naica
  • Chihuahua
    Mexico
  • A very attractive cluster of sphalerite crystals accented by duses of 1-2mm pyrite crystals that have been directionally applied to the sides of the sphlaerites. The sphalerite crystals are black with light striations and are not crazily twinned like we often see. Nice!
SphaleriteREDUCED -Various International, 40 Percent Off
  • Item #4251
  • Sphalerite
  • 4.1x2.3x2.7 cm
  • Largest Crystal Size: 30mm
  • $25.00
  • Naica
  • Chihuahua
    Mexico
  • This is a small but attractive and interesting piece. It consists of one large crystal with a stack of pyrite and smaller sphalerite crystals piled up on top of it. Looks Great!
Sphalerite, QuartzREDUCED -Various International, 40 Percent Off
  • Item #4266
  • Sphalerite, Quartz
  • 8.3x6.5x7.0 cm
  • Largest Crystal Size: 15mm
  • $45.00
  • Naica
  • Chihuahua
    Mexico
  • A mound of black sphalerite crystals with lots of small, prismatic, milky quartz crystals scattered all over them. I've taken pictures from a couple of angles on this one.
Pyrite ps. after PyrrhotiteREDUCED -Various International, 40 Percent Off
  • Item #4325
  • Pyrite ps. after Pyrrhotite
  • 9.3x7.8x7.3 cm
  • Largest Crystal Size: 23mm
  • $55.00
  • Zacatecas

  • Mexico
  • A handsome specimen consisting of sub-parallel groups of pyrrhotite crystals replaced by pyrite along with some black sphalerites and well formed crystals of pyrite. Some creamy calcite crystals, as well. The front of the specimen is tipped up at 45 degrees from horizontal for perfect display.
MontebrasiteREDUCED -Various International, 40 Percent Off
  • Item #7693
  • Montebrasite
  • 6.2x2.2x0.7 cm
  • Largest Crystal Size: as above
  • $60.00
  • Fazenda Pomeroli, Linopolis District
  • Divino das Laranjeiras, Minas Gerais
    Brazil
  • This crystal is a twin with a re-entrant angle running down it's left side. It has modest lustre and well-formed crystal faces. A little bit of the tip of the crystal is missing. A very good example of this unusual mineral.
VanadiniteREDUCED -Various International, 40 Percent Off
  • Item #7729
  • Vanadinite
  • 3.8x2.5x2.3 cm
  • Largest Crystal Size: 20mm
  • $80.00
  • Mibladen
  • Tafilalet
    Morocco
  • If te bottom bit of rock was trimmed off, this would be a killer "thumbnail" specimen. It has a larger deep orange-red vanadinite crystal out front with some smaller crystals offset behind it. Good looking piece.
DatoliteREDUCED -Various International, 40 Percent Off
  • Item #8397
  • Datolite
  • 4.1x4.0x2.3 cm
  • Largest Crystal Size: 16mm
  • $75.00
  • La Baja Mine
  • Charcas, San Louis de Potosi
    Mexico
  • A gorgeous cluster of light green transluscent, lustrous datolite crystals with some small white, associated danburite crystals. The crystals are very well formed. Nice cluster!
MimetiteREDUCED -Various International, 40 Percent Off
  • Item #8404
  • Mimetite
  • 5.8x4.9x4.6 cm
  • Largest Crystal Size: n/a
  • $90.00
  • San Antonio Mine
  • Santa Eulalia
    Mexico
  • A superb cluster of botryoidal balls of beigy mimetite. The balls are composed of tightly packed crystals of mimetite and are very good quality. Classic. Displays well.
fluorapatite, Quartz var ChalcedonyREDUCED -Various International, 40 Percent Off
  • Item #13447
  • fluorapatite, Quartz var Chalcedony
  • 6.0x3.9x2.5 cm
  • Largest Crystal Size: 22mm
  • $40.00
  • Cerro del Mercado
  • Durango
    Mexico
  • A really nice, gemmy yellow fluorapatite crystal partially embedded in interlocking quartz crystals, coloured red by hematite. Interestingly, there is a growth of chalcedony on the front of the specimen, as well. Sawn back. Displays very well.
FluorapatiteREDUCED -Various International, 40 Percent Off
  • Item #13443
  • Fluorapatite
  • 6.4x4.5x4.0 cm
  • Largest Crystal Size: 20mm
  • $40.00
  • Cerro del Mercado
  • Durango
    Mexico
  • A thick, prismatic, terminated, deep yellow fluorapatite crystal miraculously protrudes out of chalcedony on this specimen. Sawn base. Displays well!
FluorapatiteREDUCED -Various International, 40 Percent Off
  • Item #13421
  • Fluorapatite
  • 3.8x2.7x3.6 cm
  • Largest Crystal Size: 20mm
  • $35.00
  • Cerro de Mercado
  • Durango
    Mexico
  • A very gemmy, yellow fluorapatite crystal partially embedded in pure white calcite. Some of the calcite has been etched away to reveal a botryoidal silicate that looks sort of like opal. Very interesting!
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!
Cassiterite, QuartzREDUCED -Various International, 40 Percent Off
  • Item #13333
  • Cassiterite, Quartz
  • 3.8x3.8x2.1 cm
  • Largest Crystal Size: 12mm
  • $50.00
  • San Antonio Mine
  • Chambillaya, Quime, Inquisivi, La Paz
    Bolivia
  • A cluster of nice, sharp, very dark, lustrous cassiterite crystals with a little quartz. Sharp!
Cassiterite, Tourmaline, QuartzREDUCED -Various International, 40 Percent Off
  • Item #13328
  • Cassiterite, Tourmaline, Quartz
  • 9.2x4.2x3.0 cm
  • Largest Crystal Size: 10mm
  • $75.00
  • 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.
Cassiterite, Tourmaline, QuartzREDUCED -Various International, 40 Percent Off
  • Item #13327
  • Cassiterite, Tourmaline, Quartz
  • 5.1x5.1x1.4 cm
  • Largest Crystal Size: c-6mm, q-16mm
  • $45.00
  • San Antonio Mine
  • Chambillaya, Quime, Inquisivi, La Paz
    Bolivia
  • A sharp looking specimen showing a plate of tourmaline-pierced quartz crystals and scattered dark, lustrous cassiterite crystals. Striking!
Cassiterite, Tourmaline, QuartzREDUCED -Various International, 40 Percent Off
  • Item #13326
  • Cassiterite, Tourmaline, Quartz
  • 3.7x3.5x1.9 cm
  • Largest Crystal Size: 9mm
  • $40.00
  • San Antonio Mine
  • Chambillaya, Quime, Inquisivi, La Paz
    Bolivia
  • A really nice 9mm crystal of dark brown cassiterite is well exposed on a bed of white quartz crystals. The cassiterite crystal is really nice but does have a slight ding which causes the price of the specimen to be lower than you might expect. Looks great!
Cassiterite, Tourmaline, QuartzREDUCED -Various International, 40 Percent Off
  • Item #13325
  • Cassiterite, Tourmaline, Quartz
  • 6.6x3.6x1.5 cm
  • Largest Crystal Size: 9mm
  • $50.00
  • San Antonio Mine
  • Chambillaya, Quime, Inquisivi, La Paz
    Bolivia
  • Several sharp, dark brown, lustrous cassiterite crystals are scattered on this arc or quartz crystals, partially impregnated with greenish-grey tourmaline group needles.
Cassiterite, Tourmaline, QuartzREDUCED -Various International, 40 Percent Off
  • Item #13315
  • Cassiterite, Tourmaline, Quartz
  • 8.2x6.1x2.2 cm
  • Largest Crystal Size: 10mm
  • $55.00
  • San Antonio Mine
  • Chambillaya, Quime, Inquisivi, La Paz
    Bolivia
  • A plate of lustrous, sharp, dark brown cassiterite crystals, mostly at the back associated with quartz crystals and lots of needle-like tourmaline at the front of the specimen.
CalciteREDUCED -Various International, 40 Percent Off
  • Item #10310
  • Calcite
  • 5.1x4.4x3.3 cm
  • Largest Crystal Size: 31mm
  • $35.00
  • Kjorholt Mine
  • Brevik
    Norway
  • A large, terminated greyish calcite crystal sits up alongside a number of smaller crystals. The calcite crystal is an hexagonal prism with rhombohedron termination. Some tiny pyrite crystal associated. Looks good!
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 #10317
  • Calcite
  • 9.3x7.5x3.8 cm
  • Largest Crystal Size: 89mm
  • $100.00
  • Dalen-Kjorholt Mine, Level 152
  • Brevik
    Norway
  • A very unique cluster of crystals mainly consisting of a larger, flattened, zoned rhombohedral crystal. The crystal has a clear, colourless inner zone and a frosted, rhombohedral outer zone with some similar vintage, hexagonal-looking overgrowths. Very slight bruising. Unique and beautiful piece!
Xenotime-(Y), Hematite, RutileREDUCED -Various International, 40 Percent Off
  • Item #17217
  • Xenotime-(Y), Hematite, Rutile
  • 3.1x2.8x1.5 cm
  • Largest Crystal Size: x-2.0mm
  • $45.00
  • Novo Horizonte
  • Bahia
    Brazil
  • There are several sharp, well terminated xenotime crystals on this specimen. The matrix for the xenotime is composed of interlocking brilliantly lustered hematite crystals with oriented rutile crystals.
Xenotime-(Y), Hematite, RutileREDUCED -Various International, 40 Percent Off
  • Item #17218
  • Xenotime-(Y), Hematite, Rutile
  • 3.5x3.0x1.8 cm
  • Largest Crystal Size: x-2mm
  • $50.00
  • Novo Horizonte
  • Bahia
    Brazil
  • This matrix of brilliant hematite crystals of hematite with a little oriented rutile on the faces. As well there are several places where there are sharp, well terminated xenotime crystals. Really nice!
Xenotime-(Y), Hematite, RutileREDUCED -Various International, 40 Percent Off
  • Item #17221
  • Xenotime-(Y), Hematite, Rutile
  • 3.1x2.6x2.3 cm
  • Largest Crystal Size: x-2mm
  • $45.00
  • Novo Horizonte
  • Bahia
    Brazil
  • There are several sharp, xenotime crystals here and there on this matrix of interlocking hematite crystals with oriented rutile on them.
Xenotime-(Y), Hematite, RutileREDUCED -Various International, 40 Percent Off
  • Item #17222
  • Xenotime-(Y), Hematite, Rutile
  • 4.0x2.5x0.8 cm
  • Largest Crystal Size: x-2mm
  • $55.00
  • Novo Horizonte
  • Bahia
    Brazil
  • A really nice, doubly terminated xenotime crystal is located at the edge of this large lustrous, partial hematite crystal. Nice crystal!