Mineral Specimens

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  • Hardangervidda, Norway On matrix. Lustrous 14 mm.
  • Anatase

    $210.00
    Hardangervidda, Norway Anatase on matrix. Has great luster (all faces!) and striations. 1.8 cm
  • Hardangervidda, Norway Two sharp crystals parallel to one another: remarkable as they reflect light together; some matrix. Larger crystal is 12 mm.
  • Hardangervidda, Norway Sharp, slightly smoky yet clear, quartz crystal 6.5 cm with lots of lustrous anatase crystals on it. This is the sharp pointed anatase, not the flat-ended of couple of years ago. Came from the Museum of Norway circa 1971.
  • Hardangervidda, Norway Two sharp crystals to 1 cm each; whole piece is about 3 cm.
  • Apatite

    $250.00
    Brazil Extremely sharp and lustrous crystal 3 x 3 cm on orthoclase crystals; whole piece is 7 x 7 cm a second crystal at the back too.
  • Panasqueira, Portugal A large apatite crystal (4 x4 cm) with the darker core characteristic of this classic locality. Good luster, from old collection, associated muscovite.
  • Panasqueira, Portugal Remarkably well crystallized specimen, with a characteristic green color. Little if any damage. Crystal is 8 cm across and partly covered with dolomite.
  • Potosi, Bolivia Crystals of this very rare Silver-Germanium mineral on matrix; whole is about 2 cm across. We chemically check each piece for silver AND germanium to ensure it is authentic. Regarding Argyrodite, it is of historic importance because it is in this mineral that the element Germanium was discovered. If one were to digress a little on Germanium, one may add that it had been predicted by the young British chemist Newlands in 1864 as the missing element in a triad between Silicon and Tin. Seven years later the much older Russian Mendeleev specified the properties it should have using his newly devised Periodic Table of the Elements. A hunt got under way by inorganic chemists and to be brief, in 1886 Winkler found it and named it in honor of his country. The source was Argyrodite. Lest it be thought that this was a straightforward process, one might mention that Winkler having isolated it, nevertheless assigned it the wrong place among the then missing elements! It was not until some time later that another German chemist Lothar Mayer (now of Latharmayerite fame) recognised its proper identity and position in the Periodic Table that the case on Germanium was finally concluded. Now you know a little more about Argyrodite! From knowledge comes appreciation.
  • Daye, Hubei, China Selected for the luster and great crystal shape of the azurites (lack of luster and imperfect crystals have been major problems with Chinese azurites as you probably know). The 2nd picture shows luster of azurites. Whole piece is 5 x 4 cm.
  • Barite

    $80.00
    Palos Verdes, Los Angeles County, California Very well formed crystal cluster of the kind that is hard to get any more (know from having collected there myself). From the Hemel Collection. 12 cm
  • Thomas Mountains (N. end), Juab Co. Utah A 1.3 cm lustrous crystal showing cube and trisoctahedron about equally and carries remarkable "triangles" due to the latter; with topaz some of which is embedded in the crystal.