4 thoughts on “How to distinguish the authenticity of fluorite”
Veronica
★ Features of fluorite Fluorite is also called fluorite, chemical components are halide minerals such as CAF2, crystal genus crystal system. Blue or purple fluorescence is emitted under ultraviolet and cathode rays or when heated, and it is named. The crystal is often dual -crystal of cube, octopus or cube, and the set is granular or block. Light green, light purple or colorless transparency, sometimes rose red, white marks, glass luster, transparent to opaque. The eight -faced body is complete. Mohs hardness 4, a proportion of 3.18. Deep, block. Sexual crispy, transparent, glass luster and prominent fluorescent phenomenon. The density is 3.01 ~ 3.25g/cm3, and the melting temperature is about 935 ° C. It is extremely difficult to dissolve in water, soluble in acidic acid, and generate hydrogen fluoride gases with hot concentrated sulfuric acid. The total reserves of fluorite ore are the second place in the world, about a quarter of fluorite for chemical industry, and prepare hydrofluoric acid, fluoride and other fluoride. The metallurgical industry is used as a fellowing agent, such as the steelmaking, adding fluorite can reduce the lime melting point, improve the liquidity of the slag, and improve the desulfurization efficiency. In the blast furnace, the fluorite is used as a washing furnace to reduce the melting point to remove the furnace wall knot tumor. The silicate industry is used to make milk turbid glass, pottery and enamel. Colorless and transparent fluorite can be used for prisms and lenses in optical instruments. Fluorite is mainly produced in thermal liquid veins. The colorless and transparent fluorite crystal is produced in the crystal hole of the granite gantry or fluorite veins. China is one of the most fluorite minerals in the world, and it is mainly produced in Zhejiang, Hunan, Fujian and other places. Other major producing areas in the world are South Africa, Mexico, Mongolia, Russia, the United States, Thailand, Spain and other places. Fluorite can be used as a fuse in the metallurgical industry, and it is a raw material for manufacturing hydrofluoric acid in the chemical industry. ★ The nature of optical color: pure fluorite is colorless, but because it contains more Y, CE, CA and other elements, causing the floss structure to be vacant, produce color, common color, common ones, common ones, common ones, common ones, common ones, common ones, common ones, common ones, common ones, common ones. The colors are light green to dark green, blue, green, yellow, yellow, wine yellow, purple, violet color, gray, brown, rose red, dark red and so on. Gloss and transparency: glass luster; transparent to translucent. Light: Memorandum body. Refractive index: 1.438 (± 0.01) Multinarity: Non -color. Luminousness: Flutestones can have purple or purple -red fluorescence under ultraviolet light, and fluorite under cathode rays can emit purple or purple -red light; some fluorite has armal light, that is, heated on the alcohol lamp, or under sunlight, or under sunlight Exposure can emit phosphorus light. In addition, purple fluorite has the characteristics of friction and glow. Spectral absorption: The absorption spectrum of fluorite visible light is very unique and changes greatly, once absorbing. The absorption line is obvious. ★ Fluorite variety The jewelry industry often divides the variety of fluorite according to the process and color characteristics of fluorite;
It can be divided into two types: gems and jade. Gewor -grade: Single crystal particles large, transparent, fresh color, because of low hardness, rarely used for jewelry, and mostly used for viewing and collection. Jade class: It is a granular or fiber -like collection, translucent, a single color or different colors. Mostly used for carving or making process ornaments. ★ Divide fluorite according to common colors can be divided into green, purple, blue and other varieties green fluorite: blue -green, green, light green. The more common ones are crystal clusters. In ancient times, there was a soft water green crystal that it was not used. purple fluorite: deep purple, purple. It is often distributed in a strip. In ancient times, it was known as the amethyst, and it was not used. blue fluorite: gray blue, green blue, light blue, often deeper on the surface and shallow in the center. yellow fluorite: orange to yellow, often appearing in strips. The colorless fluorite; colorless transparency to semi -transparent appears with single crystals or crystal clusters. ★ The optimization treatment of fluorite and its identification The heating treatment: Heating treatment is more common in fluorite. By heating, it can turn dark blue to black fluorite into blue. Generally speaking, this heating treatment is difficult to identify, and its color is stable in environments below 300 ° C. The filled plastic or resin: Fill plastic or resin in fluorite. The main purpose is to heal the surface cracks so that it does not cause cracks when processing or wearing. ★ The appraisal of the fluorite that is filled in mainly has the following aspects: 1. A magnifying check gap. 2. The hot needle test can melt resin and plastic. 3. UV fluorescence observation, plastic and resin filled with characteristic fluorescence. ★ Dental treatment: The colorless fluorite can produce purple by radiation. The fluorite treated with radiation is extremely unstable, and the light will fade, so this treatment method does not have practical value. The quality evaluation of fluorite is transparent, non -mixed, and bright in color. The jade -level fluorite set requires that the granules are fine, dense, and large.
Crystal habits: It is often cube, octagonal body, diamond duodang body and clustering, and can also be band -shaped dense blocks.
M common colors: green, blue, brown, yellow, pink, purple, colorless, etc.
Neramids: glass luster to sub -glass luster.
The interpretation: Four groups fully explained.
Mohs hardness: 4.
Trinity: 3.18 ( 0.07, -0.18) G/CM 3.
The light characteristics: homogeneous body.
Meority: none.
Folding rate: 1.434 (± 0.001).
dual refractive index: none.
Iladder fluorescence: Various varieties of different varieties, generally strong fluorescence and phosphorus light.
The absorption spectrum: non -characteristic, large change, generally strong absorption.
Puctulating inspection: Ribbon, two or three -phase bags, showing that the explanation is triangular development.
The special optical effect: color change effect.
Optimized treatment:
The heat treatment: often treats black and dark blue thermal treatment, stable, avoid heating above 300 ° C, and it is not easy to detect.
The filling treatment: Fill the surface cracks with plastic or resin to ensure that it does not crack during processing.
The radiation treatment: colorless fluorite spokes into purple, but seeing the light quickly faded and very unstable.
or fluorite is a natural fossil. Compared with the optical glass, fluorite has the advantages of low refractive index and low color dispersing. Economic factors exist, so it is impossible to use. However, the so -called optical glass used in optical is the main raw materials with silicon dioxide (Silica) and adds additives such as Barium or Lanthanum. After the high temperature is dissolved, it will make it solidified by the liquid to solid by a very slow cooling method.
Fluorite is generally green or purple `` ` n Crystals become diamond -shaped duodang body` `smaller hardness medium gravity All measuring hardness The color of the stripe It always ask you to use a knife to draw a few times to your fluorite. is a transparent `` but fluorite is not very valuable.
Differential fluorite pay attention to the following points: 1, fluorite can glow, but very, very small. The glowing fluorite on the market is basically soaked in water. 2. Many fluorite will actually do later processing and then sell it. Just pay attention when you buy it. It is not dead, just to see it looks like a dead board. Natural things are active. Very stiff, obviously there will be a feeling of deadness. The fluorite is calcium fluoride, CAF2, is the smallest optical material, and it is also the most expensive in optical glass. Common colors: green, blue, brown, yellow, pink, purple, colorless, etc.
★ Features of fluorite
Fluorite is also called fluorite, chemical components are halide minerals such as CAF2, crystal genus crystal system. Blue or purple fluorescence is emitted under ultraviolet and cathode rays or when heated, and it is named. The crystal is often dual -crystal of cube, octopus or cube, and the set is granular or block. Light green, light purple or colorless transparency, sometimes rose red, white marks, glass luster, transparent to opaque. The eight -faced body is complete. Mohs hardness 4, a proportion of 3.18. Deep, block. Sexual crispy, transparent, glass luster and prominent fluorescent phenomenon. The density is 3.01 ~ 3.25g/cm3, and the melting temperature is about 935 ° C. It is extremely difficult to dissolve in water, soluble in acidic acid, and generate hydrogen fluoride gases with hot concentrated sulfuric acid. The total reserves of fluorite ore are the second place in the world, about a quarter of fluorite for chemical industry, and prepare hydrofluoric acid, fluoride and other fluoride. The metallurgical industry is used as a fellowing agent, such as the steelmaking, adding fluorite can reduce the lime melting point, improve the liquidity of the slag, and improve the desulfurization efficiency. In the blast furnace, the fluorite is used as a washing furnace to reduce the melting point to remove the furnace wall knot tumor. The silicate industry is used to make milk turbid glass, pottery and enamel. Colorless and transparent fluorite can be used for prisms and lenses in optical instruments. Fluorite is mainly produced in thermal liquid veins. The colorless and transparent fluorite crystal is produced in the crystal hole of the granite gantry or fluorite veins. China is one of the most fluorite minerals in the world, and it is mainly produced in Zhejiang, Hunan, Fujian and other places. Other major producing areas in the world are South Africa, Mexico, Mongolia, Russia, the United States, Thailand, Spain and other places. Fluorite can be used as a fuse in the metallurgical industry, and it is a raw material for manufacturing hydrofluoric acid in the chemical industry.
★ The nature of optical
color: pure fluorite is colorless, but because it contains more Y, CE, CA and other elements, causing the floss structure to be vacant, produce color, common color, common ones, common ones, common ones, common ones, common ones, common ones, common ones, common ones, common ones, common ones. The colors are light green to dark green, blue, green, yellow, yellow, wine yellow, purple, violet color, gray, brown, rose red, dark red and so on. Gloss and transparency: glass luster; transparent to translucent. Light: Memorandum body. Refractive index: 1.438 (± 0.01) Multinarity: Non -color. Luminousness: Flutestones can have purple or purple -red fluorescence under ultraviolet light, and fluorite under cathode rays can emit purple or purple -red light; some fluorite has armal light, that is, heated on the alcohol lamp, or under sunlight, or under sunlight Exposure can emit phosphorus light. In addition, purple fluorite has the characteristics of friction and glow. Spectral absorption: The absorption spectrum of fluorite visible light is very unique and changes greatly, once absorbing. The absorption line is obvious.
★ Fluorite variety
The jewelry industry often divides the variety of fluorite according to the process and color characteristics of fluorite;
It can be divided into two types: gems and jade.
Gewor -grade: Single crystal particles large, transparent, fresh color, because of low hardness, rarely used for jewelry, and mostly used for viewing and collection.
Jade class: It is a granular or fiber -like collection, translucent, a single color or different colors. Mostly used for carving or making process ornaments.
★ Divide fluorite according to common colors can be divided into green, purple, blue and other varieties
green fluorite: blue -green, green, light green. The more common ones are crystal clusters. In ancient times, there was a soft water green crystal that it was not used.
purple fluorite: deep purple, purple. It is often distributed in a strip. In ancient times, it was known as the amethyst, and it was not used.
blue fluorite: gray blue, green blue, light blue, often deeper on the surface and shallow in the center.
yellow fluorite: orange to yellow, often appearing in strips.
The colorless fluorite; colorless transparency to semi -transparent appears with single crystals or crystal clusters.
★ The optimization treatment of fluorite and its identification
The heating treatment: Heating treatment is more common in fluorite. By heating, it can turn dark blue to black fluorite into blue. Generally speaking, this heating treatment is difficult to identify, and its color is stable in environments below 300 ° C.
The filled plastic or resin: Fill plastic or resin in fluorite. The main purpose is to heal the surface cracks so that it does not cause cracks when processing or wearing.
★ The appraisal of the fluorite that is filled in mainly has the following aspects:
1. A magnifying check gap.
2. The hot needle test can melt resin and plastic.
3. UV fluorescence observation, plastic and resin filled with characteristic fluorescence.
★ Dental treatment:
The colorless fluorite can produce purple by radiation. The fluorite treated with radiation is extremely unstable, and the light will fade, so this treatment method does not have practical value. The quality evaluation of fluorite is transparent, non -mixed, and bright in color. The jade -level fluorite set requires that the granules are fine, dense, and large.
Fluorite
English name: Fluorite.
Mineral (rock) name: fluorite.
The material nature:
chemical composition: CAF 2.
Crystal state: Crystal Establishing: Equity Crystal system.
Crystal habits: It is often cube, octagonal body, diamond duodang body and clustering, and can also be band -shaped dense blocks.
M common colors: green, blue, brown, yellow, pink, purple, colorless, etc.
Neramids: glass luster to sub -glass luster.
The interpretation: Four groups fully explained.
Mohs hardness: 4.
Trinity: 3.18 ( 0.07, -0.18) G/CM 3.
The light characteristics: homogeneous body.
Meority: none.
Folding rate: 1.434 (± 0.001).
dual refractive index: none.
Iladder fluorescence: Various varieties of different varieties, generally strong fluorescence and phosphorus light.
The absorption spectrum: non -characteristic, large change, generally strong absorption.
Puctulating inspection: Ribbon, two or three -phase bags, showing that the explanation is triangular development.
The special optical effect: color change effect.
Optimized treatment:
The heat treatment: often treats black and dark blue thermal treatment, stable, avoid heating above 300 ° C, and it is not easy to detect.
The filling treatment: Fill the surface cracks with plastic or resin to ensure that it does not crack during processing.
The radiation treatment: colorless fluorite spokes into purple, but seeing the light quickly faded and very unstable.
or fluorite is a natural fossil. Compared with the optical glass, fluorite has the advantages of low refractive index and low color dispersing. Economic factors exist, so it is impossible to use. However, the so -called optical glass used in optical is the main raw materials with silicon dioxide (Silica) and adds additives such as Barium or Lanthanum. After the high temperature is dissolved, it will make it solidified by the liquid to solid by a very slow cooling method.
Fluorite is generally green or purple `` ` n Crystals become diamond -shaped duodang body` `smaller hardness
medium gravity
All measuring hardness
The color of the stripe
It always ask you to use a knife to draw a few times to your fluorite.
is a transparent ``
but fluorite is not very valuable.
Differential fluorite pay attention to the following points:
1, fluorite can glow, but very, very small. The glowing fluorite on the market is basically soaked in water.
2. Many fluorite will actually do later processing and then sell it. Just pay attention when you buy it. It is not dead, just to see it looks like a dead board. Natural things are active. Very stiff, obviously there will be a feeling of deadness.
The fluorite is calcium fluoride, CAF2, is the smallest optical material, and it is also the most expensive in optical glass. Common colors: green, blue, brown, yellow, pink, purple, colorless, etc.