David K. Joyce

Microminerals -Secondary Minerals, Various Localities

When bodies of mineralization are exposed to oxygen and surficial waters (WEATHER!) Primary minerals such as sulphides and sulphosalts are weathered into "secondary minerals". Here are some fine ones, many from old localities, long closed.

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.

Claraite, QuartzMicrominerals -Secondary Minerals, Various Localities
  • Item #14472
  • Claraite, Quartz
  • 1.4x0.9x0.5 cm
  • $35.00
  • Grube Clara
  • Ober-Wolfach, Schwartzenwald, Baden
  • Beautiful, green-blue crystals and hemispheres of claraite in two places on a quartz crystal section. Old Mineralogical Research Co. label. From the type locality.
PyromorphiteMicrominerals -Secondary Minerals, Various Localities
  • Item #829
  • Pyromorphite
  • micro cm
  • Largest Crystal Size: 16X
  • $20.00
  • Roughton Gill
  • Cumberland
  • Bright green, hexagonal prisms of pyromorphite on limonite matrix. Classic.
Laueite, Strunzite, RockbridgeiteMicrominerals -Secondary Minerals, Various Localities
  • Item #14492
  • Laueite, Strunzite, Rockbridgeite
  • 1.8x1.8x1.3 cm
  • Largest Crystal Size: micro
  • $40.00
  • Hagendorf Sud
  • Hessen, Bavaria
  • This is the type locality for laueite. There are lots of sharp, brown crystals of this rare mineral associated with excellent acicular strunzite crystals (also type locality!) and masses of black rockbridgeite crystals. Old Min. Res. Co label accompanies. Excellent!
UranocirciteMicrominerals -Secondary Minerals, Various Localities
  • Item #14474
  • Uranocircite
  • 5.7x3.5x2.1 cm
  • Largest Crystal Size: 1mm
  • $35.00
  • Bergen
  • Vogtland
  • Loads of platy, uranocircite crystals are formed in a thin seam exposed on the front of this granitic (pegmatitic?) matrix. Rich!
PicropharmacoliteMicrominerals -Secondary Minerals, Various Localities
  • Item #14489
  • Picropharmacolite
  • 1.3x0.8x0.4 cm
  • Largest Crystal Size: 1mm
  • $35.00
  • Richelsdorf
  • Hessen
  • This specimen is entirely composed of rounded groups of creamy picropharmacolite, forming a botryoidal grouping. Rare arsenate!
WavelliteMicrominerals -Secondary Minerals, Various Localities
  • Item #14469
  • Wavellite
  • 4.3x3.8x2.8 cm
  • Largest Crystal Size: 1.5mm
  • $35.00
  • Wood Mine
  • Meadow Creek Mountain, Locke Co.
    Tennessee, USA
  • The cavities in this brown matrix are lined with pure-white, tightly packed, acicular crystals of wavelite. Nice!
PseudomalachiteMicrominerals -Secondary Minerals, Various Localities
  • Item #14956
  • Pseudomalachite
  • 6.2x4.4x2.2 cm
  • Largest Crystal Size: n/a
  • $30.00
  • Acoplomo Mine
  • Merritt
    British Columbia, Canada
  • Hemispheres of deep-green pseudomalachite are present in a vug in this quartz matrix. Lots of other hemisphere sections are present in exposed fractures. Unusual!
PseudomalachiteMicrominerals -Secondary Minerals, Various Localities
  • Item #14955
  • Pseudomalachite
  • 4.8x3.2x2.0 cm
  • Largest Crystal Size: micro
  • $30.00
  • Acoplomo Mine
  • Merritt
    British Columbia, Canada
  • Tiny spheres of dark green pseudomalachite are present in some openings and as sectioned, radiating crystals in thin areas of this exposed seam.