Limonite-encapsulated plate-like barite crystals
The limonite-coated plate-like barite is a typical mineral assemblage under the action of epithermal or hydrothermal fluid, which combines the industrial value of barite with the oxidation characteristics of limonite.
Lavolite with color effect
Lazarite is a kind of mineral in the family of plagioclase (Plagioclase Feldspar). It is a series of similar substances with chemical composition of NaAlSiΑ O₂-CaAl₂ Si₂ O₂, mainly rich in sodium. Its name is derived from the Canadian Labrador region (Labrador), is a common mineral in igneous rocks (such as basalt, granite) and metamorphic rocks. Usually gray, black, green or brown, transparent to translucent. Glass luster, cleavage surface is pearl luster. The crystal system belongs to triclinic system with Mohs hardness of 6-6.5.
Pyrolusite with limonite inclusions
Pyrolusite (pyrolusite), the composition of manganese dioxide, is a common manganese mineral. Pyrolusite containing 63.19% manganese is an important manganese ore. Pyrolusite is very soft, its color is light gray to black, with a metallic luster. Pyrolusite is generally massive or kidney-like or earthy, sometimes with a radioactive fibrous morphology. Interestingly, some pyrolusite also exhibits a dendritic attachment to the rock surface, known as pseudoliths. Pyrolusite is other manganese ore into, in the swamps, lakes and other sediments can also form pyrolusite.
High Purity Peruvian Pyrite
This pyrite is known for its brass-colored luster and distinctive striated surface. Pyrite derives its name from the Greek word pyr, which means fire, because it produces sparks when it collides with other minerals or metals. This pyrite is usually in the shape of a cube, with a highly glossy surface, giving a mirror-like visual effect. Not only are they of great value in mineralogical research, they are also favored by collectors and mineral lovers for their beautiful appearance.
Mica
Mica (mica) is a rock mineral, is made of potassium, aluminum, magnesium, iron, lithium and other layered structure of aluminum silicate. Its English name mica comes from the Latin micare, which means "shiny. In ancient China, mica was called "Tianpi" and "Dijin", and Tianpi Mountain, the origin of mica in Inner Mongolia, was named after it. Polytypic mica is prevalent, of which monoclinic is common, followed by trigonal, and the rest are rare. Mica is usually false hexagonal or rhombohedral plate, flake, columnar crystal form. The color varies with the change of chemical composition, mainly with the increase of Fe content. The characteristics are insulation and high temperature resistance.
Gabon red soil samples
Gabonese laterite is an important mineral resource, mainly distributed in the Gabonese region of Africa. Llaterite is a type of soil rich in iron and aluminum that is commonly formed in tropical and subtropical regions. Gabonese laterite is mainly composed of iron oxides and aluminum oxides and is rich in minerals such as hematite and bauxite. Due to the large amount of iron oxides, Gabonese laterites are usually red or brownish red. The laterite is formed by long-term weathering and leaching under tropical climatic conditions. The parent rock on the surface gradually decomposes in an alternating wet and dry environment, forming a soil layer rich in iron and aluminum.
Types of Garnet Minerals
This model summarizes the types of garnet group minerals, in which the aluminum garnet is usually red, and the calcium member is usually green. General formula: X, Y (SiO)
X² = Mg², Ca², Fe², Mn², etc.
Y³ = Al³, Fe³, Cr³, V³, etc.
PyrAlSpites: aluminum garnet (Pyrope, Almandine, Spessartine) aluminum at the Y³. UGrAndites: Calcium at the X² locus of calcium garnet.
diorite
Diorite is a representative rock of neutral deep crystal rock, and it is also one of the main rock types in granite stone. It is mainly composed of plagioclase (medium-more feldspar) and one or several dark minerals, of which the total amount of dark minerals is generally about 20-35%. No or only a small amount of potassium feldspar, generally not more than 10% of the total feldspar. Does not contain or contains very little quartz, the amount of which does not exceed 5% of the total amount of light-colored minerals. Dark minerals are mainly amphibole, sometimes pyroxene and biotite. The accessory minerals are mainly apatite, magnetite, ilmenite and titanite.
synenite
It is a kind of magmatic rock, which belongs to neutral deep intrusive rock. light gray, with grainy, porphyritic structure. The content of silica (about 60%) and the diorite is quite, but the alkali (sodium oxide, potassium oxide) is slightly higher than the diorite. It is mainly composed of feldspar, hornblende and biotite, with no or very little quartz. Alkaline feldspar (usually orthoclase, microcline, striated feldspar) accounts for more than 70% of the feldspar. It is often a small rock strain, which forms a complex with basic rocks and alkaline rocks.
The orthostone of the alkaline massif
Syenite is a kind of magmatic rock, which belongs to neutral deep intrusive rock. light gray, with grainy, porphyritic structure. The content of silica (about 60%) and the diorite is quite, but the alkali (sodium oxide, potassium oxide) is slightly higher than the diorite. It is mainly composed of feldspar, hornblende and biotite, with no or very little quartz. Alkaline feldspar (usually orthoclase, microcline, striated feldspar) accounts for more than 70% of the feldspar. It is often a small rock strain, which forms a complex with basic rocks and alkaline rocks.
Syenite in alkaline rock mass
Syenite is a kind of magmatic rock, which belongs to neutral deep intrusive rock. light gray, with grainy, porphyritic structure. The content of silica (about 60%) and the diorite is quite, but the alkali (sodium oxide, potassium oxide) is slightly higher than the diorite. It is mainly composed of feldspar, hornblende and biotite, with no or very little quartz. Alkaline feldspar (usually orthoclase, microcline, striated feldspar) accounts for more than 70% of the feldspar. It is often a small rock strain, which forms a complex with basic rocks and alkaline rocks.
Ore-bearing fibrous calcite
Calcite is a calcium carbonate mineral, the most common natural calcium carbonate is it. Therefore, calcite is a widely distributed mineral. Calcite is a stable form of calcium carbonate under normal temperature and pressure, soft, white or gray or transparent, calcite crystal shape is varied, their aggregates can be a cluster of crystals, can also be granular, massive, fibrous, milky, earthy and so on. Knocking calcite can get a lot of square pieces, hence the name calcite.
banded aralite containing silicon carbide
Acid salt minerals. The composition is CaCO3. Also known as aragonite, and calcite into a homogeneous multi-like. The orthorhombic crystal system, the crystal is columnar or spear-shaped, common false hexagonal symmetry of the three-linked crystal. The aggregate is mostly shell-like, oolitic, bean-like, spherical, etc. Usually white, yellow-white. Glass luster, the fracture is grease luster. with incomplete plate cleavage. Shell-shaped fracture. Mohs hardness 3.5~4.5. Specific gravity 2.9~3.0. In the nature of the unstable arangite, often transformed into calcite. Silicon carbide is a semiconductor that occurs in nature in the form of the extremely rare mineral moissanite.
spinel crystal
Spinel (Spinel) is a beautiful and durable gem mineral, which usually occurs together with the marble parent rock (Marble matrix), forming a unique ore combination. The chemical composition of spinel is magnesium aluminum oxide (MgAl₂ Ogo), which has a variety of colors, from red, blue, green to colorless. Spinel crystals have a high degree of transparency and a bright color, usually in the shape of octahedra or rhombohedra.
silverite
Pyroxene ore is an ore containing metallic silver. The symbol of silver in the periodic table of chemical elements is Ag, and the atomic number is 47. It is a soft, white, shiny precious metal that occurs primarily in mineral form in nature, such as silver ore.
Polished Amethyst
Polished amethyst is a popular gemstone specimen. Amethyst is a purple variety of quartz that ranges in color from light purple to dark purple and is determined primarily by the presence of iron and other trace elements. Quartz is a common mineral with the chemical composition of silicon dioxide (SiO₂), which is widely found in the earth's crust. Polished amethyst and quartz are often used in jewelry and ornaments because their luster and beautiful color make them very attractive.
Peruvian cubic pyrite
Peruvian pyrite is mainly produced in Peru's famous Huanzala mine. This pyrite is known for its brass-colored luster and distinctive striated surface. Pyrite derives its name from the Greek word pyr, which means fire, because it produces sparks when it collides with other minerals or metals. This pyrite is usually in the shape of a cube, with a highly glossy surface, giving a mirror-like visual effect. Not only are they of great value in mineralogical research, they are also favored by collectors and mineral lovers for their beautiful appearance.
Basalt of the Canary Islands, Spain
Basalt is a volcanic magmatic rock with relatively low silicon content. The rock is usually dark black. This basalt has no visible crystals. Therefore, it is made of volcanic glass and microlith (crystals that cannot be distinguished by the naked eye).
fault breccia
Fault breccia is formed in the fault zone. They consist of angular rock fragments from rocks on either side of the fault. These angular detritus elements are usually surrounded by cements, usually calcite or siliceous, which are deposited in pores created by fragmentation caused by fault replay.
The volcanic bomb on Tenerife Island
The volcanic bomb from Tenerife is a type of igneous rock formed during volcanic eruptions. These volcanic bombs are formed by the cooling and solidification of molten magma in the air, usually with unique shapes and textures. During a volcanic eruption, molten magma ejected from the volcano is formed by flying and cooling in the air. These rock blocks undergo rapid cooling and solidification in the air before finally falling to the ground. Volcanic bombs come in various shapes and sizes, usually presenting streamlined, spindle shaped, or irregular shapes.
Uranium bearing igneous rock
Sphalerite
There are various colors of sphalerite, including white, gray, yellow (yellow patterned stone), blue, green, pink, and brown, while the stripes are white. The zinc in the composition is sometimes replaced by iron or manganese, and occasionally by small amounts of magnesium, calcium, cadmium, copper, cobalt, or lead. Similar to most carbonate minerals, it dissolves in hydrochloric acid and produces bubbles. In the calcite group, sphalerite belongs to a type with high hardness and specific gravity. In nature, zinc containing minerals are mostly sphalerite, and the production of sphalerite is relatively much lower. In addition to extracting zinc, it can also be used as semi transparent green or green blue gemstone jewelry.
Techereu Jade
Jasper from Techereu is a mineral discovered in the Bal ș a area of Hunedoara County, Romania. Jade is an opaque rock that can appear in almost any color, depending on the mineral composition of the original sediment or volcanic ash. In the Techereu region, jadeite mainly exists in the conglomerates of the Cretaceous period, forming multicolored jadeite.
Syenite in alkaline rock masses
It is a type of magmatic rock that belongs to neutral deep-seated intrusive rocks. Light gray, with equigranular and spotted structures. Its silica content (about 60%) is comparable to diorite, but its alkaline content (sodium oxide, potassium oxide) is slightly higher than diorite. It is mainly composed of feldspar, amphibole, and biotite, with little or no quartz. Alkaline feldspar (usually orthoclase, plagioclase, and plagioclase) accounts for over 70% of feldspar. Often appearing as small rock masses, it forms a complex with basic and alkaline rocks.
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