Sapphire is how to form the identification of sapphire

The most important characteristic of sapphire is the uneven color, can be seen in parallel hexagonal columnar arrangement, different shades of flat color band and growth lines. That sapphire is how to form it? The following is organized by me on the reasons for the formation of sapphire content, I hope you like!

Reasons for the formation of sapphire

Traditionally, sapphire symbolizes nobility, truth, sincerity and faith. For centuries, it was added to the robes of royalty and clergy to adorn them. Compared to other blue stones, such as topaz and tanzanite, sapphire's extraordinary color is the most standard and classic.

For centuries, sapphires have been associated with royal romances. The connection was even more striking in 1981, when Prince Charles of England offered Diana a sapphire engagement ring. Until the sudden death of Princess Di in 1997, the Princess had conquered the world with her grace? And her 12-carat Sri Lankan sapphire ring went down in modern history as history and mythology.

In ancient Greece and Rome, kings and queens were convinced that the sapphire could protect its owner from jealousy and harm; in the Middle Ages, clergymen wore sapphires to symbolize heaven, while the general public believed that sapphires attracted blessings from heaven; in other periods of history, in other countries and regions, people use sapphire as a symbol of chastity, which also has the same with the enemy the power to turn the enemy into the enemy, to influence the spiritual world, and to reveal the secrets of the oracle.

In folklore, history, art and consumer consciousness, the sapphire is always associated with the color blue. Its name comes from the Greek word Sappheiros, which once referred to lapis lazuli. While most jewelry consumers assume that all sapphires are blue, for gemstone jewelry specialists, the term Sapphire refers to a blue sapphire when it appears alone or is used in isolation.

A particular orange-pink sapphire is called "Padparadscha, Padparadscha", which in the Sinhala language of Sri Lanka means ? lotus flower? Only orange-pink sapphires from Sri Lanka can be marketed under the name Padparadscha. Historically, no one has been able to sell the exact amount of Padparadscha produced, but the Sri Lankans have a fascination with this color and it has an intimate emotional connection with their country.

Sapphires are a type of corundum and range in color from pure blue to greenish blue to violet blue. Name? Sapphire? can be applied to any variety of corundum except ruby, which is used as a single red variety of corundum.

In addition to blue sapphire and ruby, the corundum family also has a variety known as ? colored sapphires? members: purple, green, yellow, orange, pink, violet and some overtones. There are also some ombre sapphires that display combinations of different colors. Some gemstones exhibit a color-changing effect, showing blue under daylight or fluorescent light and purple under incandescent light. Sapphires may even be gray, black or brown.

Colored sapphires are generally rarer than sapphires, and some colors are very rare, especially in very small or very large sizes. However, the rainbow of colors that colored sapphires bring is not to be missed by anyone who craves romance, and those who seek something different often favor colored sapphires.

The mineral corundum is composed of aluminum and oxygen, and it requires a special environment for growth ? without silicon. However, silicon is a very common primary color, which makes natural corundum relatively rare. In its purest state, corundum is actually colorless. Colorless sapphires were once the most popular imitations of diamonds, and now they are making a comeback as setting stones.

But colorless corundums are rare because most tend to contain color-causing elements. When it contains iron and titanium, corundum becomes a blue sapphire. A content of just a few percentage points can cause a color shift. The higher the iron content, the darker the blue color of the sapphire. The chromium primary color, on the other hand, causes the red color of rubies, and the pink color of pink sapphires.

In the 1990s, colored sapphires found in East Africa and Madagascar became widely recognized. New mines from traditional production areas, such as Sri Lanka to Madagascar, increased the supply of sapphires including yellow, orange, pink and purple sapphires.

The wide range of colors has attracted jewelry designers away from the traditional reds, blues, and greens. Contemporary designers are now choosing colored sapphires to create stunning rainbow colors.

Corundum can exhibit the starburst effect, a line of six-shot stars that appears on the table of a plain-cut stone. All colors of corundum can exhibit the starburst effect, which is created by the reflection of directionally aligned inclusions.

In addition to colored sapphires and starbursts, color-changing sapphires are an interesting variety. These fascinating gemstones can change color under different light sources, and their presence adds a special member to the corundum family.

Gem-quality sapphires and colored sapphires are found in many regions, including Madagascar, Tanzania, Sri Lanka, Australia, and Burma, to name a few.

SAPPHIRE QUALITY FACTORS

Sapphire is one of the three major gemstones, the other two being ruby and emerald. It is the birthstone of September and has a hard texture that attracts many jewelry buyers with its practicality and romance.

How to buy sapphires

The factors for evaluating and buying sapphires are color, weight, transparency and clarity. The most important characteristics of sapphire are uneven color, polychromatic bicrystals are not developed, and dichroism is strong.

1. The color of a sapphire is an indicator of its value. A very dark-colored sapphire may sell for only one hundred Hong Kong dollars a carat, but a good cornflower blue sapphire sells for tens of thousands of Hong Kong dollars per carat. In the United States and Europe, darker colored sapphires are preferred. In Hong Kong, consumers prefer medium depth blue, which sells at a higher price. Hold the sapphire at arm's length and look carefully to see if it is blue or black in color. If it's blue, you're not far off the mark.

2. Look at the gemstone under natural daylight and artificial light. Gemstones look lighter in bright light, but darker in normal daylight.

3. See if the color is uniform. Cracks can affect the beauty and durability of the stone. If a feathery pattern extends to the surface of the stone, a sudden impact (such as when rubbing a sparrow) can cause the stone to break.

4. Don't forget to look at the cut and proportions of the stone.

5. As with rubies, beware of imitations and fakes.

Sapphires can be correctly distinguished from similar minerals by the characteristics of their respective mineral crystals. Gemstone grade blue cone ore only the United States a place of origin, production is small, although the color and sapphire is more similar, but its hardness is small, Mohs hardness is only 6-6, 5, so the hardness alone can be differentiated from sapphire; natural sapphire has a birefringent and spinel is a single refraction, such as if the blue gem can appear in the red flashes, it can be concluded that this blue gemstone for the spinel or zoisite; sapphire's high hardness, high density, high refractive index can be distinguished from tourmaline, cordierite, zoisite.

Identification of sapphire

Sapphire is as valuable as ruby, if the color, clarity, cutting good, the price is very high, a small one, often to tens of thousands of dollars. However, there are many counterfeit sapphires on the market, so be sure to be cautious and spend very little money to buy a high-quality sapphire, which is most likely to be deceived.

Sapphire belongs to the category of jewelry. Right now, the collection of jewelry is very common. But in the process of buying and selling the collection, the most important thing to learn a little identification and identification knowledge.

The market as sapphire, the most common is glass. In fact, the identification of glass or easier. Glass is molded at high temperatures and out of the natural contraction after cooling, the plane to the inward depression. This depression phenomenon is not easy to find with the naked eye, must use a magnifying glass, the use of a magnifying glass, can not be straight line focus, should focus diagonally, it is easy to find the concave, concave, usually glass. And gemstone grinding and polishing, usually to achieve a very flat effect. Another identification method is that there are many types of inclusions in glass, the most common being air bubbles, while gemstones do not have air bubbles. Air bubbles in glass can be detected by looking at them with a 10x magnifying glass.

There is also a sapphire acting as a sapphire, is a synthetic sapphire, the identification method is, first look at the texture, the texture of the structure of the natural crystallization, the natural crystallization is often messy, disordered, and thus is usually genuine. And synthetic sapphire, crystallization is often very orderly. Of course many synthetic sapphires are clean and flawless inside, which is usually also fake. This is because natural stones always have some impurities, and there are almost no flawless ones. Such synthetic sapphires often have a harsh color and a very superficial luster, without the depth of natural color. While natural gemstones have a high purity of color, not harsh, and the light naturally shoots out from the inside out.

Glass: usually colored with cobalt (Cobalt)< or cobalt system of dark blue pigment, in the color filter will be red; refractive index is different, is a single refraction.

Artificial spinel: same as above.

Sandwich stone: the upper part is a real sapphire and the lower part is a fake. Place the stone in water and carefully observe the different colors, luster and inclusions above and below the girdle.

Spinel: monorefractive, with different refractive indices.

Tanzanite: different physical properties.