Szklary (Gläsendorf), Ząbkowice (Frankenstein), Ząbkowice District, Lower Silesia (Dolnośląskie), Poland

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The town of Szklary has a world-class gem chrysoprase deposit. The chrysoprase occurs in a silicate-type nickel deposit (nickel-bearing serpentinite), formed by hydrothermal and later lateritic weathering of ultramafic rocks (peridotites). The deposit is cut by numerous pegmatitic and oligoclasitic veins which are associated with a nearby Variscan syenite massif.

A pegmatite is exposed in one of the pits of the abandoned Ni mine and is listed as a separate locality (Mt. Szaklana Mine).

The deposit, which was was mined since the Middle Ages for chrysoprase (first known occurrence), was explored for nickel since 1891, first from underground workings and, since 1935, from open casts. The mines were finally abandoned around 1980. Excavation of the locality arranged by the 1st Mindat conference organizers in July, 2010 resulted in a major find of exceptional pimelite specimens and a mineralogical investigation is underway to re-validate the species.

Sachanbiński et al. (2000) mention also an Os-bearing phase, Ba2CaOsO6, among heavy minerals of the weathering cover of Szklary serpentinite massif.

Mineral List

Mineral list contains entries from the region specified including sub-localities

Actinolite 'Alipite' Alluaudite Almandine 'Almandine-Spessartine Series' Anthophyllite Antigorite Antimony 'Apatite' Arsenic Beryl Beusite 'Biotite' Bismuth 'Cheralite-(Ce)' Chlorapatite 'Chlorite Group' 'var: Brunsvigite' Chromite Chrysoberyl 'Chrysoprase' Chrysotile Clinochlore

Columbite-(Mn) Dravite Dumortierite Enstatite var: Bronzite Epidote Fersmite Fluorapatite var: Mn-bearing Fluorapatite 'Garnierite' Goethite Gold Hematite Holtite 'Hornblende' Hydroxylapatite 'Iddingsite' 'Kerolite' 'Leucoxene' 'Limonite' Magnesioferrite Magnesite Magnetite Microcline

Microlite Group Mitridatite Molybdenite 'Monazite' Muscovite Népouite Niggliite Nimite Nioboholtite (TL) 'Olivine' Opal Palladium Paradocrasite 'Pimelite' Platinum Pyrochlore Group 'Pyrochlore Supergroup var: Betafite (of Hogarth 1977)' Pyrope Quartz Ranciéite Romanèchite Rutile Saponite

Saponite var: Bowlingite Schorl 'Serpentine Group' Silver Spessartine Spinel var: Pleonaste 'Stevensite' Stibarsen Stibiocolumbite Stibiotantalite Szklaryite (TL) Talc Tantalite-(Mn) Titanoholtite (TL) 'Tourmaline' Tremolite Trevorite Uraninite Xenotime-(Y) Zircon Zoisite

122 entries listed. 65 valid minerals. 3 type localities (valid minerals).

Localities in this Region

Poland Lower Silesia (Dolnośląskie) Ząbkowice District Ząbkowice (Frankenstein) Szklary (Gläsendorf) Kozmice (Kosemitz; Kosemutz) Marta mine Mt. Szklana Mine (Szklary pegmatite) Szklary Chrysoprase Mine

References