Minerals and Crystals

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Collection of Minerals and Crystals available

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GYPSUM

Chemical formula: CaSO4.2(H2O)
Gypsum is a very soft mineral composed of calcium sulfate dihydrate. It is able to grow in colorless or translucent crystals also of considerable size, object of collecting, of which the most common type is the desert rose.

Gypsum

Origin: Toscany – Italy
Weight:  35 g
Size:  5,5 x 3,5 x 3 cm

Item number:  004
Price:   3,00 €

 

Gypsum

Origin: Toscany – Italy
Weight:  30 g
Size:  5,5 x 3,5 x 3 cm

Item number:  005
Price:   3,00 €

 

Gypsum

Origin: Toscany – Italy
Weight:  195 g
Size:  15 x 6 x 3 cm

Item number:  006
Price:   6,00 €

 

minerali minerals Gypsum

Origin: Italy
Weight:  17 g
Size:  4 x 3,5 x 1,5 cm

Item number:   034
Price:   1,50 €


HYALINE QUARTZ

Chemical formula: SiO2
The hyaline quartz or rock crystal is a variety of quartz and belongs to the class of silicates. The varieties of quartz are: colorless (hyaline or rock crystal), violet (amethyst var), yellow and orange (var. Citrine), brown, black and gray (smoked var), pink (pink var), white (milky var); intermediate colors and cases of polychromatism are also possible (partly yellow and partly violet crystals, ametrine var).

minerali minerals Hyaline quartz

Origin: Italy
Weight:  14 g
Size:  3,5 x 2 x 1,8 cm

Item number:   032
Price:   1,50 €

 

minerali minerals Hyaline quartz

Origin: Italy
Weight:  4 g
Size:  1,5 x 1 x 1 cm

Item number:   033
Price:   2,00 €


GREEN BROCHANTITE

Chemical formula: Cu4(SO4)
The mineral is the result of the oxidation of copper mines where it is formed by deterioration of other minerals. It is found in arid climates since in wet ones the mineral can be dissolved in weakly acid waters.

minerali minerals Brochantite

Origin: Miniera di Libiola (GE) – Italy
Weight:  72 g
Size:  6 x 4 x 2 cm

Item number:  013
Price:   6,00 €


GREEN STEATITE (GREEN TALC)

Chemical formula: Mg3Si4O10(OH)2
Talc is a mineral of secondary origin, present both in eruptive rocks, and, frequently, in metamorphic ones, of which it may also be the main component: in this case we speak of talcoscisti. Instead, the genesis of its deposits of minerals may be due to regional metamorphism of basic rocks or siliceous dolomites, or of magnesium silicate dolomitic limestones. Finally, the deposits may also have originated due to the addition of fluids rich in carbon dioxide and silica, on ultrabasic rocks, or by contact metamorphism in sedimentary rocks.

minerali minerals steatite talc

Origin: Val di Taro (PR) – Italy
Weight:  160 g
Size:  7 x 4 x 4 cm

Item number:  014
Price:   8,00 €


BURMITE (FOSSIL RESIN)

Chemical formula: C10H16O + (H2S)
Burmite (derived from Burma) is a fossil resin, similar to amber, but less hard, found in Burma. Burmite is the most fascinating amber in the world. It contains the largest quantity and diversity of the Paleobiota of the Cretaceous, in many cases perfectly preserved. Many new species and families are discovered each year, some already extinct. Burmese amber or burmite was formed at a time of great change in life on earth. The origin and radiation of angiosperm ¨The flowering plants¨ have had an important impact on the fauna of insects, because insects are intimately associated with plants, especially as pollinators and phytophagous angiosperms. Burmese amber is dated to the Cretaceous period, from the late Albian to the Cenomanian, between 96 and 105 million years ago. The mining area is located in the Hukawng valley, in the state of Kachin, in northern Myanmar.

Burmite ambra birmana

 

Origin: Burma

Item number:   016
Price:   3,00 €

 

Burmite ambra birmana

 

Origin: Burma

Item number:   017
Price:   3,00 €


CALCITE

Chemical formula: CaCO3
Typical mineral of sedimentary origin, both by direct chemical precipitation from evaporation of supersaturated solutions, and by sedimentation of organic remains of marine organisms that use calcium carbonate as a constituent of their shell. It can also originate in metamorphic and rarely magmatic rocks, where it is deposited in the fractures in which the high-temperature and super-saturated fluid circulates.

minerali minerals calcite

Origin: Lombardia – Italy
Weight:  410 g
Size:  9 x 8 x 7 cm

Item number:   018
Price:   3,00 €

 

minerali minerals calcite

Origin: Lombardia – Italy
Weight:  275 g
Size:  8 x 6 x 5 cm

Item number:   019
Price:   3,00 €

 

minerali minerals calcite

Origin: Lombardia – Italy
Weight:  150 g
Size:  7 x 5 x 4 cm

Item number:   020
Price:   3,00 €

 

minerali minerals calcite

Origin: Lombardia – Italy
Weight:  140 g
Size:  6 x 6 x 4 cm

Item number:   021
Price:   2,00 €

 

minerali minerals calcite

Origin: Lombardia – Italy
Weight:  45 g
Size:  3 x 3 x 2 cm

Item number:   022
Price:   1,00 €


GALENA

Chemical formula: PbS
Galena is a mineral, a lead sulphide belonging to the group of the same name. The name derives from the ancient Greek physician Galen (2nd century BC). First described by Pliny the Elder as lead ore. Galena often contains sensitive percentages of silver, for this reason it is also known as galena argentifera or argentiferous lead.

minerali minerals galena

Origin: Zorzone (BG) – Italy
Weight:  52 g
Size:  4 x 4 x 3 cm

Item number:   030
Price:   2,00 €


PYRITE

Chemical formula: FeS2
Pyrite is a very common mineral composed of iron disulfide, such as marcasite, which takes its name from the Greek term πῦρ pyr (fire) as it produces sparks when struck with a piece of metal. Because of its gold color it was known in the past as the gold of fools; when heated over a flame it emits a mixture of sulphides with the classic smell of rotten eggs.

minerali minerals pyrite

Origin: Lombardia – Italy
Weight:  26 g
Size:  4 x 2 x 1 cm

Item number:   031
Price:   2,00 €


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