As I have studied Geology as an optional subject and gone through a detailed analysis of Minerals, their manner of formation, origin, color, Pleochroism, Form And Habit, Cleavage and Relief.
So,once i happened to watch them in reality in Paris in GALERIE DE MINÉRALOGIE ET DE GÉOLOGIE (Meteorites)and this
Muséum national d’Histoire naturelle(for minerals).I truly wish to hug them ,i was so delighted that i wish to tell them you know i have learned about you fellas and watching you in reality is my dream cum true moment.
Aragonite, widespread mineral, the stable form of calcium carbonate (CaCO3) at high pressures. It may be distinguished from calcite, the commoner form of calcium carbonate, by its greater hardness and specific gravity.
Aragonite is always found in deposits formed at low temperatures near the surface of the Earth, as in caves as stalactites, in the oxidized zone of ore minerals (with lead substituting for calcium), in serpentine and other basic rocks, in sediments, and in iron-ore deposits.
Hyaline quartz, better known as rock crystal, is pure silica which is frequently in the form of hexagonal prisms surmounted by a pyramid at each end.Like all siliceous minerals,
hyaline quartz does not effervescence to acids; it sparkles with lighter and it easily scratches glass and steel. It represents the seventh term of the Mohs scale, that is to say that its hardness is between that of the orthoclase and that of the topaz.
Malachite is a green copper carbonate hydroxide mineral with a chemical composition of Cu2(CO3)(OH)2. It was one of the first ores used to produce copper metal. It is of minor importance today as an ore of copper because it is usually found in small quantities and can be sold for higher prices for other types of use.
Malachite has been used as a gemstone and sculptural material for thousands of years and is still popular today. Today it is most often cut into cabochons or beads for jewelry use.
Malachite has a green color that does not fade over time or when exposed to light. Those properties, along with its ability to be easily ground to a powder, made malachite a preferred pigment and coloring agent for thousands of years.
Dolomite is a common rock-forming mineral. It is a calcium magnesium carbonate with a chemical composition of CaMg(CO3)2. It is the primary component of the sedimentary rock known as dolostone and the metamorphic rock known as dolomitic marble. Limestone that contains some dolomite is known as dolomitic limestone.
Dolomite is rarely found in modern sedimentary environments, but dolostones are very common in the rock record. They can be geographically extensive and hundreds to thousands of feet thick. Most rocks that are rich in dolomite were originally deposited as calcium carbonate muds that were postdepositionally altered by magnesium-rich pore water to form dolomite.
Azurite is a copper carbonate hydroxide mineral with a chemical composition of Cu3(CO3)2(OH)2. It is best known for its characteristic deep blue to violet-blue color. The blue color, known as “azure,” is like the deep blue evening skies often seen above deserts and winter landscapes.
Azurite precipitation occurs in pore spaces, fractures, and cavities of the subsurface rock. The resulting azurite is usually massive or nodular. In rare situations, azurite is found as stalactitic and botryoidal growths. Well-formed monoclinic crystals are infrequently found.
Euchroite is a hydrated copperarsenatehydroxide mineral with formula: Cu2AsO4OH·3H2O. It is a vitreous green to emerald green mineral crystallizing in the orthorhombic system. It has a Mohs hardness of 3.5 – 4.0 and a specific gravity of 3.39 – 3.45. It was first described in 1823 in Ľubietová, Slovakia.
So,here is description of minerals and meteorites.
1.Benld is an ordinary chondrite (H6) that fell the morning of September 29th, 1938, in Macoupin County, Illinois.
The Benld meteorite was only the second meteorite recovered in Illinois (there are now 10 recognized meteorites from the state), and its fall was quite spectacular.
The meteorite was described by B.H. Wilson in Popular Astronomy (1938) as “crashing out of the battlements of heaven, aimed apparently with the precision of a crack artilleryman, not only striking but penetrating the roof of a garage, as well as the car inside, thereby creating a situation, which, in several respects, is believed to be unique in the annals of meteoric phenomena”.
2.The Sylacauga meteorite is the first documented extraterrestrial object to have injured a human being. The grapefruit-sized fragment crashed through the roof of a farm house, bounced off a large wooden console radio, and hit Hodges while she napped on a couch. The 34-year-old woman was badly bruised on one side of her body, but was able to walk. The event received worldwide publicity.