Minerals and Crystals

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Collection of Minerals and Crystals available

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AMETHYST

Chemical formula: SiO2
Amethyst is a variety of quartz and belongs to the class of silicates. The quartz varieties are: colorless (hyaline or rock crystal), violet (amethyst var), yellow and orange (citrine var), brown, black and gray (smoky 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 Amethyst

Origin: Brasil
Weight:  103 g
Size:  7 x 4 x 2 cm

Item number:   001
Price:   7,50 €

 

Amethyst minerals

Origin: Brasil
Weight:  115 g
Size:  5,5 x 5,5 x 2 cm

Item number:  002
Price:   7,50 €


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.

minerali minerals Gypsum

Origin: Toscany – Italy
Weight:  40 g
Size:  7,5 x 4 x 2,5 cm

Item number:  003
Price:   3,50 €

 

Gypsum

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

Item number:  004
Price:   3,50 €

 

Gypsum

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

Item number:  005
Price:   3,50 €

 

Gypsum

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

Item number:  006
Price:   6,50 €


PYRITE

Chemical formula: FeS2
Pyrite is a very common mineral composed of iron disulfide (II) (FeS2) which takes its name from the Greek word pyros (fire) because it produces sparks if struck with a piece of metal. Because of the gold color it was known in the past as the fool’s gold; if heated to the flame it emits a mixture of sulfides with the classic smell of rotten eggs. It is often associated with other minerals

minerali minerals Pyrite

Origin: Peru
Weight:  20 g
Size:  2,5 x 2,5 x 2 cm

Item number:  007
Price:   3,50 €

 

Pyrite

Origin: Peru
Weight:  25 g
Size:  3 x 2,5 x 2 cm

Item number: 008
Price:   3,50 €


BITERMINATED 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: Arkansas
Weight:  35 g
Size:  6 x 2,5 x 2 cm

Item number:  009
Price:   8,00 €


AGATE NODULE

Chemical formula: SiO2
Agate (from the Greek ἀχάτης, achátes) is a variety of chalcedony, a generic name given to quartz, when this occurs in compact masses of microcrystalline silica with fibrous-oriented texture. The agate has a typical zoned structure and is visible even to the naked eye, thanks to the diversity of color.

minerals Agate nodule

Origin: Brasil
Weight:  1.450 g
Size:  17 x 14 x 5 cm

Item number:  010
Price:   20,00 €

 

minerali minerals Agate nodule

Origin: Brasil
Weight:  800 g
Size:  13 x 11 x 4 cm

Item number: 011
Price:   16,00 €

 

Agate nodule

Origin: Brasil
Weight:  1.000 g
Size:  15 x 13 x 4 cm

Item number:  012
Price:   18,00 €


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:   6,50 €


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:   10,00 €


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:   015
Price:   3,00 €

 

Burmite ambra birmana

 

Origin: Burma

Item number:   016
Price:   3,00 €

 

Burmite ambra birmana

 

Origin: Burma

Item number:   017
Price:   3,00 €

 

Burmite ambra birmana

 

Origin: Burma

Item number:   018
Price:   3,00 €

 


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