Rare and valuable minerals

How to distinguish real prasiolite from a fake?

In some countries (for example, the USA), light green quartz is directly prohibited from being called green amethyst; it is recommended to use the correct name – prasiolite. However, in our country, even if the word “prasiolite” is used in the description of a stone, it is only in parentheses after “green amethyst”, so it is clearer and more pleasant for the buyer to choose. Natural prasiolites from a Brazilian deposit And it cannot be said that this is completely wrong, because in the vast majority of cases, the green quartz sold is an amethyst, but corrected and given a pleasant light green color during heating. In nature, colored light green quartz (natural prasiolite) is found in many places, but in very small quantities. The only center for the extraction of natural prasiolites now is located in Brazil, and the volumes of this deposit cannot in any way correspond to the number of green amethysts laid out on the shelves of all jewelry stores. Regular purple amethyst and amethyst-derived light green prasiolite But green prasiolite is very easily obtained from ordinary lilac amethyst, and of low quality. Dirty gray-purple amethyst is heated to five hundred degrees, and transparent crystals of the same “onion green” color (i.e., the color of leek greens) that characterize natural prasiolite are obtained. In general, when heated, amethysts usually turn yellow or amber (that is, citrines), but some purple amethyst deposits in South and North America produce stones that turn green when heated. There is also a method of heating amethysts in combination with ionization, which also produces prasiolites stably. Large transparent prasiolites (in this case heated) are very beautiful stones It is not easy to distinguish natural prasiolite from former purple amethyst, but it is possible. An experienced jeweler will use the so-called “Chelsea filter” – a simple optical device under which natural light green quartz will remain green, but formerly heated amethyst will appear pinkish. In addition, natural prasiolites are usually very light, but improved green amethysts in the store, on the contrary, have a rather expressive herbal tint. The saturation of the color reveals the unnaturalness of the stone. The too saturated color of prasiolite indicates its man-made origin by heating the amethyst Thirdly, like purple amethysts, natural prasiolites fade in the sun. Of course, this is a so-so method for testing, it takes a long time and it’s a pity for the stones, but the fact is that brighter heated green amethysts have a lasting color, and natural ones, which are not too saturated in color, can lose 10-20% of the intensity of green light in a year if they a lot of sun. There is no point in checking prasiolites in large chain jewelry stores – this is too rare a stone to end up on the counter of a networker who loves unification. Prasiolites are found at private jewelers, where you can actually buy real, natural, green quartz. Prasiolite in jewelry from large chain stores is most likely synthetic Nowadays, synthetic quartz has also become widespread – these are the ones that can be found in chain stores under the guise of green amethysts. Synthetics can be identified by their lower heat capacity – stones quickly heat up from the heat of the hand, unlike natural quartz. And experts see the synthetic origin of the stone by the smallest characteristic internal inclusions, visible under magnification. Prasiolite is a type of crystalline quartz that gets its name from its green color. Translated from Greek, “prazon” means leek. The natural stone prasiolite (also known as prazem) is extremely rare, so much so that it is not used in jewelry at all. As a rule, natural prasiolite is not entirely transparent and rarely has significant dimensions. All that you can find on the market under this name is refined (by heating or irradiation) quartz, the color of which is obviously not natural. There is nothing wrong with this, but beware of unscrupulous sellers who pass off refined prasiolite as natural. This stone itself is natural, but its color is not of natural origin. Natural prasiolite also has an unpleasant property: it quickly fades when exposed to sunlight, turning into ordinary rock crystal. Physicochemical characteristics Chemical formula – SiO2 Color – onion green Transparency – transparent or translucent Hardness – 7 on the Mohs scale Density – 2,65 g / cm3 Kink – conchoidal, all fragile Varieties Prasiolite, despite the fact that in most cases it is an artificially grown mineral, has a wide range of shades of green. It can be a rich onion green color or green with a yellow tint. The color of the final product depends on the source material and the method of hardening the stone. It can be: light green, emerald, dark green, almost colorless, lemon. Place of Birth Natural prasiolite is mined in a few countries in the world, among them India, Russia, Zimbabwe, and South Africa. Application and Use Prasiolite is used in optical instruments, in ultrasound generators, in telephone and radio equipment (as a piezoelectric). It is consumed in large quantities by the glass and ceramic industries (rock crystal and pure quartz sand). Also used in the production of silica refractories and quartz glass. Many varieties of prasiolite are used in jewelry. How to distinguish real from fake Natural stones are very rare, so it is not surprising that substitute stones have taken their place. Substitutes for natural praseolite are amethysts that have undergone a color change due to heat treatment. Not all amethysts become green when irradiated; more often they turn yellow, like citrine. You should know that there is no such definition as “green amethyst” in sellers’ terminology. Green quartz obtained from amethyst will be called prasiolite, as well as yellow quartz – citrine. Prasiolites are also easily confused with “praseolites,” which is the name given to heat-treated iolites (a type of cordierite). The main advantage of synthetic prasiolite is that it is very difficult to distinguish it from natural one without special equipment, and production costs are minimal. Medicinal properties The healing properties of the stone are multifaceted. It is often used by traditional healers. Healers recommend filtering water using prasiolite – this is how it can bring maximum benefits to the body. Water infused on a stone can also have a positive effect; it should be used for cosmetic purposes. Traditional recipes claim that if you wash your face with this water, you can quickly rejuvenate your skin, improve its condition, and get rid of acne.
Experts who practice lithotherapy claim that prasiolite has a beneficial effect on the respiratory system, alleviates colds and promotes a speedy recovery. Magical properties In ancient times, it was believed that all quartz (which includes prasiolite) are the astral skin of the planet, and crystals are some kind of recording devices that reliably store signals sent by the Universe. Currently, many specialists, as well as people simply knowledgeable about this topic , claim that prasiolite has magical properties and is a stone of illusion. Only experienced fortune tellers, magicians and psychics can use it for their rituals. For inexperienced masters, the magic stone will give out wishful thinking – it will confuse or show pictures of the desired cloudless future, which exists only in the imagination of the questioner. Best regards, Katerina (Napoleonka)

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