Quartz

Quartz is a hard, crystalline mineral composed of silicon and oxygen atoms. The chemical formula is SiO2.May occur either in well-formed crystals, sometimes enormous and weighing up to 130 kg ( 289 lb), or in compact and concretionary masses, microcrystalline (quartzites) to cryptocrystalline ( agates, jaspers, carnelian, etc.). Colorless when pure (rock crystal). The presence of impurities may give a whole range of colors. Quartz crystals are usually hexagonal and prismatic. Quartz is one of the commonest minerals of the earth's crust. It occurs in plutonic rocks ( granites, granodiorites, tonalites) and in hypabyssal ( granite, porphyries, pegmatites, ect.) and volcanic rocks (quartz porphyry, rhyolites)Stable in sedimentary conditions either either as detrital mineral ( alluvial, marine and desert sands).Quartz is so common that it is impossible to list all the places where it is found.Rock Cystal occurs mainly in pegmatites, Alpine fissures and geodes. Famous localities include Minas Gerais ( Brazil), Val Cristillina in St. Gotthard region, Italy ( Dosso dei Cristalli, Val Malenco, Sondrio, Val d'Aosta, Alto Adige), Austria, France and Japan. Carrara marble from Italy contains unusually clear crystals. Small, perfect rock crystals are sometimes found in cavities in dolomitic rock (Selvino, Bergamo, Italy, Herkimer County NY USA). Collectors of crystals used to believe that transparent, colorless rock crystal war petrified ice. A very important mineral in industry because of its piezoelectric properties, its ability to rotate the plane of polarization of light and its transparency I ultraviolet rays (heat-ray lamps, prisms and lenses)

Faden Quarzt 4,5X2,5X2 cm 0,020 kg

Faden Quarzt 4,5X2,5X2 cm 0,020 kg

7,00 €

Faden Quarzt 4,5X3,5X3 cm 0,025 kg

Faden Quarzt 4,5X3,5X3 cm 0,025 kg

4,50 €

Faden Quarzt 4,5X3X2 cm 0,030 kg

Faden Quarzt 4,5X3X2 cm 0,030 kg

5,00 €

Faden Quarzt 4,5X4,5X3 cm 0,030 kg

Faden Quarzt 4,5X4,5X3 cm 0,030 kg

5,00 €

Faden Quarzt 4X2,5X4 cm 0,020 kg

Faden Quarzt 4X2,5X4 cm 0,020 kg

4,00 €

Faden Quarzt 4X2X3,5 cm 0,025 kg

Faden Quarzt 4X2X3,5 cm 0,025 kg

4,50 €

Faden Quarzt 4X3X1,5 cm 0,015 kg

Faden Quarzt 4X3X1,5 cm 0,015 kg

5,00 €

Faden Quarzt 4X4X3 cm 0,040 kg

Faden Quarzt 4X4X3 cm 0,040 kg

7,00 €

Faden Quarzt 5,5X5X3 cm 0,075 kg

Faden Quarzt 5,5X5X3 cm 0,075 kg

12,00 €

Faden Quarzt 5X2,5X2,5 cm 0,020 kg

Faden Quarzt 5X2,5X2,5 cm 0,020 kg

4,00 €

Faden Quarzt 5X2,5X2,5 cm 0,025 kg

Faden Quarzt 5X2,5X2,5 cm 0,025 kg

5,00 €

Faden Quarzt 5X2X3 cm 0,015 kg

Faden Quarzt 5X2X3 cm 0,015 kg

4,00 €

Faden Quarzt 5X3,5X2,5 cm 0,035 kg

Faden Quarzt 5X3,5X2,5 cm 0,035 kg

6,00 €

Faden Quarzt 6,5X2,5X1,5 cm 0,035 kg

Faden Quarzt 6,5X2,5X1,5 cm 0,035 kg

6,00 €

Faden Quarzt 6,5X4X3 cm 0,080 kg

Faden Quarzt 6,5X4X3 cm 0,080 kg

14,00 €

Faden Quarzt 6X3X3 cm 0,020 kg

Faden Quarzt 6X3X3 cm 0,020 kg

6,00 €

Faden Quarzt 6X4X1 cm 0,025 kg

Faden Quarzt 6X4X1 cm 0,025 kg

4,00 €

Faden Quarzt 7,5X4,5X4,5 cm 0,080 kg

Faden Quarzt 7,5X4,5X4,5 cm 0,080 kg

14,00 €

Faden Quarzt 7,5X4X3 cm 0,060 kg

Faden Quarzt 7,5X4X3 cm 0,060 kg

10,00 €

Faden Quarzt 8X4,5X3 cm 0,095 kg

Faden Quarzt 8X4,5X3 cm 0,095 kg

15,00 €

Quartz Crystal    6,5X6X4 cm 0,105 kg

Quartz Crystal 6,5X6X4 cm 0,105 kg

27,00 €

Quartz Crystal    7,5X5X5 cm 0,145 kg

Quartz Crystal 7,5X5X5 cm 0,145 kg

37,00 €

Quartz Crystal    7X4,5X3 cm 0,110 kg

Quartz Crystal 7X4,5X3 cm 0,110 kg

30,00 €

Quartz Crystal    7X5X4 cm 0,120 kg

Quartz Crystal 7X5X4 cm 0,120 kg

30,00 €