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Facts You Need to Know About Aquamarine
General information about Aquamarine
In the beryl genus, aquamarine is second only to emeralds in popularity. Fine aquamarines are matched with diamonds and mounted in platinum in this jewelry set.
The name “aquamarine” comes from two Latin words, aqua meaning “water” and marina meaning “sea”.
In the commercial market, aquamarine competes with blue topaz, which is treated for attention, but aquamarine sells for much better quality than blue topaz. In early 2012, wholesale prices for high-quality 3-ct African stone ranged from $ 65 to $ 120 per carat, depending on the level of color saturation.
Aquamarine hardness and transparency make it popular with designers, artists and sculptors. Gemmakers use aquamarine for fantasy cuts and ornaments.
Aquamarine color range is very narrow: it can be blue, light green, light blue, light green, light green or light green.
Although Sapphire Aquamarine is one of the most popular blue gemstones on the market. However, even in the darkest shades, aquamarine rarely matches the sapphire blue.
Like most beryls, well-formed aquamarine crystals usually have six columns with flat faces at their ends.
The table trimmer is parallel to the length of the crystal. The gemstone has a pleochroic color that appears almost colorless and intense blue in different crystal directions. Fortunately, the blue pleochroic color coincides with the shear orientation that retains most of the weight. Cutters often design aquamarines as emerald cut or round or oval. Rough rocks are plentiful, so well-cut rocks are usually available. Aquamarine crystals can range from small to large, up to 100 pounds. (45 kg) in some cases. Large stones are available for purchase, but it is difficult to use large stones in jewelry, so there is less demand for them. As a result, the price per carat tends to decrease for sizes in excess of 25 cts.
Fashionable aquamarines often have to be moderately large – usually over 5 cts. – To show very dark colors. Although small gemstones are rarely saturated enough to attract, rocks from some mines in Africa – Nigeria, Madagascar and Mozambique, for example – are known to be intensely colored at sizes below 5 cts. For this reason, small stones of the same color can sell for more than one carat more than large stones of the same color.
Most faceted aquariums are eye-catching. Some crystals may contain liquid inclusions, but the clarity characteristics are minimal or absent in most finished gemstones.
Aquamarine imitation and synthesis
Russian growers produce hydrothermal synthetic aquamarine, but it is not widely available. The most common aquamarine imitations were treated with topaz blue, pale blue glass, synthetic spinel blue with cobalt.
Separating natural aquamarine from all other imitations can be fairly easy. Standard emerald tests such as refractive index and Chelsea filter easily distinguish aquamarine from its emulators.
Aquamarine sources and markets today
Brazil has been the source of the world’s highest quality gemstones since 1811, when a miner discovered a large aquamarine crystal in a riverbed near Teofilo Otoni. It weighs about 15 pounds. (7 kg) and it was the first large aquamarine crystal ever recorded. Millions of carats of freshwater gems are found in thousands of mines across the region. The largest seawater crystal on record was discovered in 1910 in Minas Gerais, Brazil. 244 lbs (110 kg), 19 inches (48 cm) long and 15 inches (38 cm) in diameter
Although luxurious blue-green crystals are worn with water, most of them are of gemstone quality and are transparent enough that people can read the printed page through the length of the crystal.
When German immigrants settled in Brazil around 1850, they discovered that they could dig almost anywhere with almost any kind of tools and make aquamarine crystals. Someone sent the sample to Idar-Oberstein, Germany – then now the main cutting center for examination. That was the beginning of gem mining and the close market relationship between Brazilian miners and German miners.
Most aquamarine mines are located in northeastern Minas Gerais. Although some dark crystals come directly from pegmatite, alluvial deposits yield most of the material. Historically, emeralds and other gems have been found in riverbanks or mined by independent miners called garimpeiros. Because the new rules make it difficult for garimpeiros to operate, the method of restoration has switched to mechanical mining.
There are no accurate production figures for Brazilian gems as no official records are kept. However, commercial sources estimate that less than 5 percent of the output from the Minas Gerais contains dark blue rock of the highest quality.
Pakistan is another major aquamarine producer. Pegmatites form green and blue crystals, some up to 12 inches (30 cm) long and 5 inches (12 cm) wide. Miners also found blue crystals.
China has recently become the world’s leading producer of small-scale seawater and commercial quality. Most stones are about 6×4 mm and commercial sizes rarely exceed 10×8 mm or about 2 cts. Raw mining techniques damage many crystals, and the yield of gem quality crystals is only between 10 and 15 percent. Some traders say that if Chinese miners were more careful, they could produce larger stones with deeper colors.
China’s Aquamarine replaces Brazilian material in most jewelery, which has a wide range of markets available through home shopping chains and high-end department stores.
The introduction of blue topaz, which was treated in the 1980s, had a negative impact on the aquamarine market in the United States, but not elsewhere. Consumers in Japan and Europe love seawater and are prepared to pay a hefty price for top quality gems.
In the late 1990s, Japan was the best market for high quality aquamarine. Medium to high quality batteries also sell well in Germany and Italy, and almost all grades are marketed in the United States.
Nigeria has been known as a source of aquamarine, producing large and beautiful materials since the early 1990s. Generally speaking, most of the characteristic colors of Nigerian aquamarine are light blue from green to blue and have a uniform color. This makes them favorable among the many TV shopping chains that produce silver jewelry with a large market.
Mozambique and Madagascar
The deposits of Madagascar and Mozambique are the most recent discovery of high-quality seawater of dark colors. Materialism in Mozambique may have rich blue waterfalls, especially treasures from this area.
From Mozambique “Santa Maria” Aqua has a very nice natural blue color. In addition, it is distinguished from aquamarine from other regions by its ability to hold strong colors even in small rocks. Pocket-rich pegmatites containing beryl stones are widespread and widespread throughout Africa. It seems to me that soon we will expect to see more aquamarine production from many parts of Africa.
Less important sources are Australia, Kenya, the United States and Zambia.
Almost all of the blue in aquamarine comes from the heat treatment of blue-green, yellow-green or even yellow-brown gemstones. The heat control process can remove the yellow component and leave a pure blue hue to the stone.
It is standard practice to cut rough stone and then heat the stone fashion. Because most aquamarines do not contain liquid inclusions, they respond well to heat treatment. Depending on the mine source and the clarity of the rock, the aquarium heat treatment is between 482ºF and 1,292ºF (250ºC and 700ºC) for different durations. You heat treatment batteries with significant integration for longer periods at lower temperatures. In most cases, the heat treatment in aquamarine is not detected and the treated color appears to be permanent.
However, some traders leave untreated seawater and use its peculiarities to promote it. Its untreated color sets it apart from its rivals, which are treated with blue topaz. Some traders see a saturated market of blue topaz as a sign of a good time ahead for aquamarine. And due to widespread concern today about untreated gemstone treatments such as natural aquamarine attract more users than ever before.
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