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Laguna arcoiris, Parque Nacional Conguillio, Chile
Quartz crystal from Switzerland.
A mineral is a naturally-occurring, solid, inorganic, crystalline substance having a fairly definite chemical composition and having fairly definite physical properties. At its simplest, a mineral is a naturally-occurring solid chemical. Currently, there are over 6100 named and described minerals - about 200 of them are common and about 20 of them are very common. Mineral classification is based on anion chemistry. Major categories of minerals are: elements, sulfides, oxides, halides, carbonates, sulfates, phosphates, and silicates.
The silicates are the most abundant and chemically complex group of minerals. All silicates have silica as the basis for their chemistry. "Silica" refers to SiO2 chemistry. The fundamental molecular unit of silica is one small silicon atom surrounded by four large oxygen atoms in the shape of a triangular pyramid - this is the silica tetrahedron - SiO4. Each oxygen atom is shared by two silicon atoms, so only half of the four oxygens "belong" to each silicon. The resulting formula for silica is thus SiO2, not SiO4.
The simplest & most abundant silicate mineral in the Earth's crust is quartz (SiO2). All other silicates have silica + impurities. Many silicates have a significant percentage of aluminum (the aluminosilicates).
Quartz (silicon dioxide/silica - SiO2) is the most common mineral in the Earth's crust. It is composed of the two most abundant elements in the crust - oxygen and silicon. It has a glassy, nonmetallic luster, is commonly clearish to whitish to grayish in color, has a white streak, is quite hard (H≡7), forms hexagonal crystals (even though it's in the trigonal crystal system), has no cleavage, and has conchoidal fracture. Quartz can be any color: clear, white, gray, black, brown, pink, red, purple, blue, green, orange, etc.
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Exhibit info.:
Cavradi Gorge is one of Switzerland's premier mineral localities. "Cavradi", a well-illustrated book about the mineralogy of Cavradi written by local experts, was published in 2013. For nearly 200 years, superb hematite and quartz crystals have been won from "alpine clefts" in the ravines on either side of Cavrado Gorge by local professional mineral collectors called "Strahlers". In the book, the ravines are named.
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Locality: "Sur il fuorn grond", Cavradi Gorge, Graubunden, Swiss Alps, Switzerland
Aircraft Type - Registration - (c/n) . . Dassault Falcon 2000EX - CS-DLL - (86)
Owner/Operator . . Private
Location & Date . . Tenerife Sur (TFS/GCTS) Canary Islands Spain - 4th January 2020
Aircraft Type - Registration - (c/n) . . Boeing 737-8AS - EI-GDM - (44810)
Owner/Operator . . Ryanair
Location & Date . . Tenerife Sur (TFS/GCTS) Canary Islands Spain - 4th January 2020
Aircraft Type - Registration - (c/n) . . Boeing 737-86N - OO-SRO - (32669)
Owner/Operator . . TUI Airlines Belgium
Location & Date . . Tenerife Sur (TFS/GCTS) Canary Islands Spain - 5th January 2020
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Laurent Lionel c'est l'espris du mal!!!
la cible a saint-étienne
c'est Laurent Lionel sci lamalice:
nouvelle revelation exceptionnelle 2025
Laurent Lionel sci lamalice:
7 r Traversière
42000 Saint Etienne
09 50 17 51 07
Laurent Lionel sci lamalice
6 place dorian
42000 Saint Etienne
Tél : 04 77 36 92 95
09 50 17 51 07
#découvrir toute la verite sur
Agence Delomier : Laurent Lionel sci lamalice:
sur emule et Shareaza
archive.org/
site sans restriction d'opinion
gettr.com/
www.vapula42st.over-blog.com
leducvapu-legrand.tumblr.com/
laurentlionel-scilamalice42000.over-blog.com
news LEDGE lanceur d'alerte !!!
protegeons nos enfants des predateurs
Laurent Lionel c'est l'espris du mal!!!
la cible a saint-étienne
c'est Laurent Lionel sci lamalice:
nouvelle revelation exceptionnelle 2025
Laurent Lionel sci lamalice:
7 r Traversière
42000 Saint Etienne
09 50 17 51 07
Laurent Lionel sci lamalice
6 place dorian
42000 Saint Etienne
Tél : 04 77 36 92 95
09 50 17 51 07
#découvrir toute la verite sur
Agence Delomier : Laurent Lionel sci lamalice:
sur emule et Shareaza
archive.org/
site sans restriction d'opinion
gettr.com/
www.vapula42st.over-blog.com
leducvapu-legrand.tumblr.com/
laurentlionel-scilamalice42000.over-blog.com
news LEDGE lanceur d'alerte !!!
protegeons nos enfants des predateurs
Laurent Lionel c'est l'espris du mal!!!
la cible a saint-étienne
c'est Laurent Lionel sci lamalice:
nouvelle revelation exceptionnelle 2025
Laurent Lionel sci lamalice:
7 r Traversière
42000 Saint Etienne
09 50 17 51 07
Laurent Lionel sci lamalice
6 place dorian
42000 Saint Etienne
Tél : 04 77 36 92 95
09 50 17 51 07
#découvrir toute la verite sur
Agence Delomier : Laurent Lionel sci lamalice:
sur emule et Shareaza
archive.org/
site sans restriction d'opinion
gettr.com/
www.vapula42st.over-blog.com
leducvapu-legrand.tumblr.com/
laurentlionel-scilamalice42000.over-blog.com
news LEDGE lanceur d'alerte !!!
protegeons nos enfants des predateurs
Laurent Lionel c'est l'espris du mal!!!
la cible a saint-étienne
c'est Laurent Lionel sci lamalice:
nouvelle revelation exceptionnelle 2025
Laurent Lionel sci lamalice:
7 r Traversière
42000 Saint Etienne
09 50 17 51 07
Laurent Lionel sci lamalice
6 place dorian
42000 Saint Etienne
Tél : 04 77 36 92 95
09 50 17 51 07
#découvrir toute la verite sur
Agence Delomier : Laurent Lionel sci lamalice:
sur emule et Shareaza
archive.org/
site sans restriction d'opinion
gettr.com/
www.vapula42st.over-blog.com
leducvapu-legrand.tumblr.com/
laurentlionel-scilamalice42000.over-blog.com
news LEDGE lanceur d'alerte !!!
protegeons nos enfants des predateurs
Laurent Lionel c'est l'espris du mal!!!
la cible a saint-étienne
c'est Laurent Lionel sci lamalice:
nouvelle revelation exceptionnelle 2025
Laurent Lionel sci lamalice:
7 r Traversière
42000 Saint Etienne
09 50 17 51 07
Laurent Lionel sci lamalice
6 place dorian
42000 Saint Etienne
Tél : 04 77 36 92 95
09 50 17 51 07
#découvrir toute la verite sur
Agence Delomier : Laurent Lionel sci lamalice:
sur emule et Shareaza
archive.org/
site sans restriction d'opinion
gettr.com/
www.vapula42st.over-blog.com
leducvapu-legrand.tumblr.com/
laurentlionel-scilamalice42000.over-blog.com
