Mineral: Quartz (variety rock crystal)
Locality: Klammalm, Navis, Innsbruck-Land District, North Tyrol, Tyrol/Tirol, Austria
Dimensions: 5 x 4,5 cm

Description: Glassy clear Quartz. One can see the structure of the matrix rock behind (see the close-ups). These clear Quartzes from Navis were mined for use as oscillating quartzes in radios, mainly before WW II.

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