<h1 class="pgc-h-arrow-right" > preface</h1>
The poem has clouds "between the fireflies and the grass, the geese rise up in the reeds", even if the flowers are full of flowers, they are not inferior to the hometown fireflies, and the little light of the fireflies flying on summer nights always gives people warm comfort. There is a magical stone that emits fireflies-like fluorescence under ultraviolet or cathodic rays, hence the name "glowstone".
firefly
Fluorite, also known as fluorite. The main component is calcium fluoride (CaF2), isometric crystal system. Crystals are cubes or octahedrals. Glass luster, bright and changeable color, brittle texture, Mohs hardness of 4, melting point 1360 °C, with fully cleavage properties. Some samples emit light under conditions of friction, heating, ultraviolet radiation, etc.
<h1 class="pgc-h-arrow-right" > "orange, yellow, green, blue, purple, who holds the color to practice the air dance"</h1>
Pure fluorite colorless, due to crystal defects, impurity elements, etc. added, natural fluorite presents green, blue, purple, yellow and other colors, and even a piece of crystal presents a variety of colors, both "a hundred thousand sounds at will, mountain flowers red purple tree height" of the bright, but also "Lushan Mountain North splash blue blue, Biluo wrapped jade screen" of the cold, as well as "a good year of scenery need to remember, the most is orange, yellow, orange and green time" brilliant. As a result, fluorite is also known as the "most vivid gem in the world".
Fluorite has low hardness and is usually not used as jewelry, but because of its soft texture, when larger crystals appear, it is easier to use for carving and decoration, so fluorite is very popular in the ore collection industry.
▲Colorful fluorite
<h1 class="pgc-h-arrow-right" > "the pearl is born and the cliff does not dry"</h1>
Fluorite comes from the remnants of volcanic magma, in the magma cooling process, the aqueous gas solution separated by the magma contains chlorine, fluorine, boron and other elements, in the process of the solution rising along the fissure, the temperature is reduced, the pressure is reduced, and the fluoride ions in the aqueous gas solution are combined with the calcium ions in the surrounding rocks to form calcium fluoride, that is, crystal clear fluorite.
Fluorite is mainly a hydrothermal mineral, commonly found in veins or gas-liquid catharsis rocks, and can be found in carbonate rocks, alkaline intrusive rocks and vent holes around volcanoes. In the veins, it is often symbiotic with quartz, calcite, barite, galena and sphalerite.
Fluorite and dolomite
Fluorite and calcite
Fluorite and mica
Fluorite with calcite, pyrite
<h1 class="pgc-h-arrow-right" > "the stars are brilliant, if out of it"</h1>
As a common mineral, fluorite is widely distributed. The world's gemstone grade fluorite is mainly distributed in the United States, Colombia, Canada, the United Kingdom and other places. Like the United States of Illinois, Kentucky and other purple, blue, yellow, brown and colorless transparent fluorite, New Hampshire and New York State produce bright green fluorite, Colombia produces green fluorite; Canada Ontario produces colorless transparent fluorite; the United Kingdom Cornwar produces white, blue, violet, light reddish brown fluorite; Namibia produces emerald green fluorite. China is one of the countries with the most fluorite minerals in the world, except for Shanghai, Tianjin, Tibet, Ningxia and other provinces, municipalities and autonomous regions that have not yet found valuable fluorite ore, the rest of the provinces, municipalities and self-smelting areas have fluorite ore distribution, with Hunan fluorite the most, followed by Inner Mongolia and Zhejiang.
<h1 class="pgc-h-arrow-right" > "ancient relics"</h1>
In the Neolithic Age, the Hemudu people of China used fluorite for decoration. The mining and excavation of fluorite originated in ancient Egypt, when fluorite was widely used to make statues and scarab-shaped carvings. In ancient Rome, fluorite was widely used as a precious stone for the production of wine glasses and vases, and the ancient Romans even believed that fluorite wine glasses would make people not drunk. Fluorite mining began in England around 1775, and was also mined in many parts of the United States between 1800 and 1840, and after the promotion of open-hearth steelmaking techniques, large quantities of fluorite ore began to be mined.
<h1 class="pgc-h-arrow-right" > "three pounds of cold water jade are extracted and refined into a night pearl"</h1>
"Sit and watch the moon come out of the tide, the night pearl in the crystal plate", the night pearl is one of the most famous treasures in ancient China, and it is also a symbol of perfection and beauty for the ancients, the rising moon of the tide is like a pearl, and the moon is only comparable to the beauty of the pearl. "Hanging pearls and four hangings, day vision as stars, night look like the moon", visible night pearls as its name, night can be self-illuminating, which coincides with the characteristics of fluorite luminescence, coupled with fluorite in China's geological reserves are higher, crystals are generally larger, hardness is lower, easy to process, so geologists speculate that the night pearl in China's history is more likely to be fluorite.
Plains of Namibia
<h1 class="pgc-h-arrow-right" > "Sui Zhu and Bi Shi Zhen"</h1>
In 2007, when miners were mining mineral crystals on The Elongo Mountain in Namibia, they found an unprecedented combination of black and green fluorite in the crystal cave, which is a masterpiece of nature's magic. One of the unfinished crystals contains several pieces of high-quality fluorite with a diameter of nearly 5 cm attached to a white crystal with a length of more than 20 cm in the main crystal. Named The Eyes of Africa, this top-of-the-line specimen of fluorite crystals gazes at namibia, a mineral-rich African land, like a deep and mysterious eye. The "Eye of Africa", which is about 58 cm high, 30 cm wide and weighs 28.2 kg, is a veritable treasure that is leased by the Perot Museum of Nature in Dallas, USA, and displayed in the Lida Hill Gem mineral exhibition hall.
The Eye of Africa
<h1 class="pgc-h-arrow-right" > "I am born to be useful."</h1>
Fluorite is shaped like a pearl, with high ornamentality, but also widely used in all aspects of human production and life. In the industrial field, fluorite can reduce the melting point of insoluble substances, promote flow, is a co-solvent for steelmaking, is one of the raw materials for the production of hydrofluoric acid, and is widely used in the production process of glass, ceramics and cement. In the field of optics, due to the low dispersion of fluorite lenses, less color difference than ordinary glass lenses, it is often used to make high-end cameras and high-end microscope lenses; in the field of art, fluorite specimens with bright colors and beautiful crystalline morphology can be used for collection, decoration and engraving crafts.
Fluorite is always crystal gorgeous, exquisite, natural multi-color, "people idle osmanthus flowers fall, night quiet spring mountain sky", spring distant mountains are green; "Yuanyuan water zhi red, veins of crabapple", Xia Hejuanting is pink; "Jinjing sycamore autumn leaves are yellow, bead curtains do not roll night frost", autumn meaning is yellow; "who will flatten the land of thousands of piles of snow, cut into this smallpox", cold winter wind and snow is white. The colors of fluorite are as colorful as the spring and autumn seasons of the world, and presumably the poetry of fluorite is more or less the diversity of nature.
~ THE END ~
Article from: Sanqin Geology
Editors| Zhang Wenshuo, Luo Ting, Kang Qinqin, Zhao Pengbin, Zhang Yafeng, Zhang Zhenkai, Wu Chunyan, Zhu Meng
The | of the picture is derived from the Internet