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costume jewelry sets wholesale How is the starlight effect of gems produced?

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There are many gemstones that can produce starlight effect in nature. 현재, 있다 10 kinds of gems known as: 사파이어, 루비, almandine, 녹주석, 남옥, spinel, diopside, cordierite, columnar and enstatite pyroxene. 그중, the starlight effect of sapphire is the most common and the particles are large and eye-catching.

Take sapphire, which has the most significant starlight effect, as an example. During its formation, if there are higher impurities in the ore-forming mother liquor, such as titanium ions, these titanium ions may form needles during the crystallization process. The rutile crystals are arranged in three groups of sapphire crystals in different directions in the form of inclusions, and form an angle of 120 degrees. When the sapphire is cut perpendicular to the c-axis into a plain face (ie egg face), the top of the gem Three bright bands at an angle of 120 degrees are formed, and the six-ray starlight effect is produced. It is equivalent to three sets of intersecting cat-eye effects.

In natural rubies and sapphires, there are often a lot of small needle-shaped rutile (component Ti02) or small tubular cracks. Since red and sapphire are both trigonal crystal systems, needle-shaped rutile or tubular fissures are often oriented along the hexagonal direction. 그러므로, when the gem is cut into a hemispherical body gem, there are often six or even twelve shots of starlight. , So that the gems look more beautiful and moving. When the transparency of the gem is poor and the color is slightly darker, the starlight effect is more obvious. 그러므로, red and sapphire with good transparency and color are often polished into prismatic gemstones instead of pursuing the starlight effect.

 

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