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Neptunite on natrolite San Benito Co , California Lustrous dark brown (not black) neptunites sharply contrasting with snow-white natrolite; damage mostly on side 9 x 5.5 cm . . $290 |
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Poopo, Bolivia A particularly rich specimen in terms of thickness of crystals as well as size of specimen, front and back. A rare sulfide 9 cm x 7 ..$350 |
reverse side; again "rods" much thicker than usual for most cylindrite. This is from an old collection, material of current production consists of much thinner crystals. cylindrite is named for the cylindrical shape of its crystals: an unusual phenomenon in crystals. Do you care to learn how this can be? |
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N'Chwaning mine, Kuruman, South Africa. A 10 cm cast of red garnet with gaudefroyite on both sides and stout white Barite crystals to 3.5 cm. |
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