Geology Science

Aliabad, Hunza Valley, Gilgit District, Gilgit-Baltistan (Northern Areas), Pakistan

Diopsideis a member of pyroxene group mineral with formula is MgCaSi2O6. Specimens can be colorless but are more often bottle green, brownish green, or light green in color.  It has two distinct prismatic cleavages at 87 and 93° typical of the pyroxene series. Diopside occurs in the form of equant to prismatic…

Lazurite, pyrite, calcite

Lazurite is a member of sodalite group in feldspathoid mineral also it is tectosilicate with formula is (Na,Ca)8[(S,Cl,SO4,OH)2|(Al6Si6O24)]. A sodium calcium aluminosilicate, lazurite is the main component of the gemstone lapis lazuli and accounts for the stone’s intense blue color, although lapis lazuli also typically contains pyrite, calcite, sodalite, and haüyne.…

Sodalite crystal blue stone

Sodalite crystal

Sodalite is a feldspathoidal tectosilicate mineral that is rich royal blue widely used as an ornamental gemstone. Chemical formula is Na8 (Al6Si6O24) Cl2.  Specimens can be blue, gray, pink, colorless, or other pale shades. They sometimes fluoresce bright orange under ultraviolet light. Sodalite nearly always forms massive aggregates or disseminated…

Leucite-from-Vesuvius-Naples-Campania-Italy

Leucite in cross polarized light

Well-Crystalized-Leucite-in-Matrix

Leucite is a feldspathoid mineral in group of tectosilicate. It is a rock forming mineral include potassium and aluminium tectosilicate, formula is K[AlSi2O6].Specimens can also be colorless or gray. Crystals are common and can be up to 31 ⁄2 in (9 cm) wide. More often, leucite occurs as…

Nepheline – USGS Mineral Specimens

Nephelineis the most common feldspathoid mineral in the world, its name from the Greek word nephele, which means “cloud” a reference to the fact that the mineral becomes cloudy or milky in strong acids. Specimens are usually white in color, often with a yellowish or grayish tint. They can also be colorless, gray, yellow, or red-brown. Nepheline is generally…

Scolecite

Zeolite

Zeolite is a group of silicate minerals that a family of hydrated aluminosilicate minerals that contain alkali and alkaline-earth metals with unusual properties with importance industrial application. Zeolite form is usually well-formed crystals with pale colors and generally soft and can easily crushed.They are found in geologically young volcanic fields.  Most common zeolite…

Haineaultite-Analcime-Natrolite

Bombay Quarry, Mumbai District (Bombay District), Maharashtra, India

Natrolite is a tectosilicate mineral belong to zeolite group members.Its formula Na2Al2Si3O10 • 2H2O. A hydrated sodium aluminosilicate, natrolite takes its name from the Greek word natrium, which means “soda” a reference to the sodium content of this mineral. Natrolite can be pale pink, colorless,…

Fault and Types of Faults

Fault Types

Fault is a fracture or crack where two rock blocks slide past one to another. If this movement may occur rapidly, it can be causes earthquike or slowly, in the form of creep.Types of faults include strike-slip faults, normal faults, reverse faults, thrust faults, and oblique-slip faults. Faults can be small and large complex interconnection fault systems and can replace one type of…

Sphalerite-Alston-Moor-Cumbria-Britain

Sphalerite-Elmwood-Mine-Smith-County-Tennessee-USA

Sphalerite-Elmwood-Mine-Smith-County-Tennessee-USA2

Sphalerite-pyrite-American-Mine-Bingham-Utah-USA

Sphalerite mineral is in group of Sulfide mineral that is formula ((Zn, Fe)S).It is the principal ore of zinc. Pure sphalerite is colorless and rare. Normally, iron is present, causing the color to vary from pale…

Autunite

Autunite

Meta-autunite Specimen – A fine specimen seen at the Rice Northwest Museum of Rocks and Minerals collection on display at the Tucson Gem and Mineral Show, Westward Look Resort, 2017. From the Daybreak Mine near Frankline, Spokane County, Washington.

Autunite is a phosphate mineral that formula is calcium uranium phosphate (Ca (UO2)2(PO4)2·10–12H2O) and It is harness of 2 – 2, 5.A…

Wollastonite

Wollastonite

Wollastoniteis a group of innosilicate mineral, formula is CaSiO3 that may inlude small amount of magnesium, manganese and iron substituting for calcium. A valuable industrial mineral, wollastonite is white, gray, or pale green in color. It occurs as rare, tabular crystals or massive, coarse-bladed, foliated, or fibrous masses. Its crystals are usually triclinic,…

Hydrophane opal (precious opal) dried out (Tertiary; Ethiopia)

Opal from Yowah, Queensland, Australia

Opal is classed a mineraloid, crystalline forms of silica, which are classed as minerals, unlike and hydrated amorphous form of silica (SiO2·nH2O); its water content may range from 3 to 21% by weight, but is usually between 6 and 10%. It is colorless when pure, the vast majority of common opal…