Mineralogy Mineralogy Amygdules form when the vesicular cavities (created by expanding gas bubbles in volcanic lava) are filled with a secondary mineral such as calcite, quartz, or one of the zeolites, which are deposited by having minerals "wash" through the pores in the rock (see Porosity/Permeability). They are filled from the outside, making the amygdules concentrically layered. ...more on Wikipedia about "Amygdule"
In gemology, aventurescence (sometimes called aventurization) is an optical reflectance effect seen in certain gems. The effect amounts to a metallic glitter, arising from minute, preferentially oriented mineral platelets within the material. These platelets are so numerous that they also influence the material's body colour. In aventurine quartz (actually a type of quartzite) chrome-bearing fuchsite makes for a green stone, and various iron oxides make for a red stone. ...more on Wikipedia about "Aventurescence"
In gemology, chatoyancy is an optical reflectance effect seen in certain gemstones. Coined from the French, meaning "cat's eye," chatoyancy arises either from the fibrous structure of a material, as in tiger eye quartz, or from fibrous inclusions or cavities within the stone, as in cat's eye chrysoberyl. The effect can be likened to the sheen off a spool of silk; the mobile, wavering reflection always being perpendicular to the direction of the fibres. For a gemstone to show this effect it must be cut en cabochon, with the fibers or fibrous structures parallel to the base of the finished stone. ...more on Wikipedia about "Chatoyancy"
Cleavage, in mineralogy, is the tendency of crystalline materials to split along definite planes, creating smooth surfaces, of which there are several named types: ...more on Wikipedia about "Cleavage (crystal)"
In mineralogy, shape and size give rise to descriptive terms applied to the typical appearance, or habit of crystals. ...more on Wikipedia about "Crystal habit"
In mineralogy and crystallography, a crystal structure is a unique arrangement of atoms in a crystal. A crystal structure is composed of a unit cell, a set of atoms arranged in a particular way; which is periodically repeated in three dimensions on a lattice. The spacing between unit cells in various directions are called its lattice parameters. The symmetry properties of the crystal are embodied in its space group. ...more on Wikipedia about "Crystal structure"
A crystal system is a category of space groups, which characterize symmetry of structures in three dimensions with translational symmetry in three directions, having a discrete symmetry group. A major application is in crystallography, to categorize crystals, but by itself the topic is one of 3D Euclidean geometry. ...more on Wikipedia about "Crystal system"
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Crystallization is a solid-liquid separation technique, or the process of formation of solid crystals from a homogeneous solution. ...more on Wikipedia about "Crystallization processes"
Evaporites are water-soluble, mineral sediments that result from the evaporation of saline water. Most evaporites are derived from bodies of sea-water, though saline lakes may also be an important source (e.g. the Great Salt Lake in Utah). ...more on Wikipedia about "Evaporite"
Felsic is a term used in geology to refer to silicate minerals, magmas, and rocks which are enriched in the lighter elements, such as silica, oxygen, aluminium, sodium, and potassium. The term combines the words " feldspar" and " silica." ...more on Wikipedia about "Felsic"
Fluid inclusions are microscopic bubbles of liquid and gas that are trapped within crystals. As minerals often form from a liquid or aqueous medium, tiny blebs of that liquid can become trapped within the crystal structure or in healed fractures wirhin a crystal. These small inclusions range in size from 0.1 to 1 mm and are usually only visible in detail by microscopic study. ...more on Wikipedia about "Fluid inclusions"
Geodes ( Greek geoides, "earthlike") are geological rock formations which occur in sedimentary and certain volcanic rocks. Geodes are essentially rock cavities or vugs with internal crystal formations or concentric banding. The exterior of the most common geodes is generally limestone or a related rock, while the interior contains quartz crystals and/or chalcedony deposits. Other geodes are completely filled with crystal, being solid all the way though. These types of geodes are called nodules. ...more on Wikipedia about "Geode"
Gilsonite is a form of natural asphalt found in large amounts only in the Uintah Basin of Utah. Discovered in the 1860, it was first marketed as a laquer, electrical insulator and waterproofing compound about twenty-five years later by Samuel H. Gilson. ...more on Wikipedia about "Gilsonite"
Gossan is intensely oxidized, weathered or decomposed rock, usually the upper and exposed part of an ore deposit or mineral vein. In the classic gossan or iron cap all that remains is iron oxides and quartz often in the form of boxworks, quartz lined cavities retaining the shape of the dissolved ore minerals. In other cases quartz and iron oxides, limonite, goethite, and jarosite, exist as pseudomorphs replacing the pyrite and primary ore minerals. Frequently gossan appears as a red stain against the background rock and soil due to the abundance of oxidized iron and the gossan may be a topographic positive area due to the abundance of erosion resistant quartz and iron oxides. ...more on Wikipedia about "Gossan"
In materials science, hardness is the characteristic of a solid material expressing its resistance to permanent deformation. Hardness can be measured on the Mohs scale or various other scales. ...more on Wikipedia about "Hardness"
The International Mineralogical Association (IMA) is an international group of 38 national societies. The goal is to promote the science of mineralogy and to standardize the nomenclature of the 4000 plus known mineral species. The IMA is affiliated with the International Union of Geological Sciences (IUGS). ...more on Wikipedia about "International Mineralogical Association"
A Jargoon or Jargon (occasionally in old writings jargounce and jacounce) is name applied by mineralogists to those zircons which are fine enough to be cut as gemstones, but are not of the red color which characterizes the hyacinth or jacinth. The word is related to Arab zargun (zircon). Some of the finest jargoons are green, others brown and yellow, whilst some are colorless. The colorless jargoon may be obtained by heating certain colored stones. When zircon is heated it sometimes changes in color, or altogether loses it, and at the same time usually increases in density and brilliancy. The so-called Matura diamonds, formerly sent from Matara (or Matura) , in Sri Lanka, were decolorized zircons. The zircon has strong refractive power, and its lustre is almost adamantine, but it lacks the fire of the diamond. The specific gravity of zircon is subject to considerable variation in different varieties; thus Sir A. H. Church found the sp. gr. of a fine leaf-green jargoon to be as low as 3-982, and that of a pure white jargoon as high as 4-705. Jargoon and tourmaline, when cut as gems, are sometimes mistaken for each other, but the sp. gr. is distinctive, since that of tourmaline is only 3103-2. Moreover, in tourmaline the dichroism is strongly marked, whereas in jargoon it is remarkably feeble. The refractive indices of jargoon are much higher than those of tourmaline. ...more on Wikipedia about "Jargoon"
This is a list of minerals with Wikipedia articles. Mineral variety names and mineraloids are to be listed after the valid minerals for each letter. ...more on Wikipedia about "List of minerals"
It is currently not possible to have a "complete list of minerals". The International Mineralogical Association is the international group that recognises new minerals and new mineral names. However, minerals discovered before 1959 did not go through the official naming procedure. Some minerals published previously have been either confirmed or discredited since that date. This list contains a mixture of mineral names that have been approved since 1959 and those mineral names believed to still refer to valid mineral species (these are called "grandfathered" species). ...more on Wikipedia about "List of minerals (complete)"
It is currently not possible to have a "complete list of minerals". The International Mineralogical Association is the international group that recognises new minerals and new mineral names, however minerals discovered before 1959 did not go through the official naming procedure, although some minerals published previously have been either confirmed or discredited since that date. This list contains a mixture of mineral names that have been approved since 1959 and those mineral names believed to still refer to valid mineral species (these are called "grandfathered" species). ...more on Wikipedia about "List of minerals A-B (complete)"
It is currently not possible to have a "complete list of minerals". The International Mineralogical Association is the international group that recognises new minerals and new mineral names, however minerals discovered before 1959 did not go through the official naming procedure, although some minerals published previously have been either confirmed or discredited since that date. This list contains a mixture of mineral names that have been approved since 1959 and those mineral names believed to still refer to valid mineral species (these are called "grandfathered" species). ...more on Wikipedia about "List of minerals C-E (complete)" This article is made for http://www.shortopedia.com shortopedia
It is currently not possible to have a "complete list of minerals". The International Mineralogical Association is the international group that recognises new minerals and new mineral names, however minerals discovered before 1959 did not go through the official naming procedure, although some minerals published previously have been either confirmed or discredited since that date. This list contains a mixture of mineral names that have been approved since 1959 and those mineral names believed to still refer to valid mineral species (these are called "grandfathered" species). ...more on Wikipedia about "List of minerals F-J (complete)"
It is currently not possible to have a "complete list of minerals". The International Mineralogical Association is the international group that recognises new minerals and new mineral names, however minerals discovered before 1959 did not go through the official naming procedure, although some minerals published previously have been either confirmed or discredited since that date. This list contains a mixture of mineral names that have been approved since 1959 and those mineral names believed to still refer to valid mineral species (these are called "grandfathered" species). ...more on Wikipedia about "List of minerals K-M (complete)"
It is currently not possible to have a "complete list of minerals". The International Mineralogical Association is the international group that recognises new minerals and new mineral names, however minerals discovered before 1959 did not go through the official naming procedure, although some minerals published previously have been either confirmed or discredited since that date. This list contains a mixture of mineral names that have been approved since 1959 and those mineral names believed to still refer to valid mineral species (these are called "grandfathered" species). ...more on Wikipedia about "List of minerals N-R (complete)"
It is currently not possible to have a "complete list of minerals". The International Mineralogical Association is the international group that recognises new minerals and new mineral names, however minerals discovered before 1959 did not go through the official naming procedure, although some minerals published previously have been either confirmed or discredited since that date. This list contains a mixture of mineral names that have been approved since 1959 and those mineral names believed to still refer to valid mineral species (these are called "grandfathered" species). ...more on Wikipedia about "List of minerals S-T (complete)"
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