Jewelry knowledge: What is the pleochroism of gemstones?

Are beautiful and mysterious jewels and jade really so difficult to understand? unattainable? Difficult to distinguish between true and false? Ask the industry experts to answer for everyone. What is the pleochroism of gemstones and what is the principle? Answer: The concept of gem pleochroism refers to non-homogeneous colored minerals. Are beautiful and mysterious jewels and jade really so difficult to understand? unattainable? Difficult to distinguish between true and false? Ask the industry experts to answer for everyone.　　　　 What is the pleochroism of gemstones, and what is the principle?　　　　 Answer: The concept of gem pleochroism refers to heterogeneous colored minerals. Due to the difference in the directionality of the internal structure, it absorbs different colors of light differently, making the minerals show different colors in different directions. The pleochroism of 　　　　 purple spodumene appears as purple and pink in different directions. 　　　　 pleochroism actually reflects the anisotropy of the crystal. There are two kinds of crystals. One is the same in all directions. The crystal structure is the same in the three-dimensional space. We call it a homogeneous body, such as garnet, fluorite, and spinel. When light enters this type of gem, the color is the same in different directions.　　　　 Compared with a homogeneous body, a heterogeneous body referred to in mineralogy, the internal crystal structure is different in the three-dimensional direction. When light enters this crystal, different directions show different colors.　　　　The different colors shown by the pleochroism of gems　　　　So how should we look at the characteristics of pleochroism? Many people think that pleochroism is not good, because this property affects the uniformity and beauty of gems. For example, for sapphire, people pay special attention to pleochroism. When processing, the design table is perpendicular to the optical axis to make the sapphire appear blue. Otherwise, the cutting direction is wrong, which will affect the brilliance and uniformity of the sapphire color, and the blue color may appear blue-green, reducing the value of the gem. In the evaluation of royal blue, the color is required to be uniform and pure. When the color of the countertop is multi-color, it cannot be rated as royal blue. Polychromism is an important factor to be considered in the cutting process of gemstones. The pleochroism of 　　 cordierite The pleochroism of 　　　　　　　　　　　　　　　　　　　　　 pleochroism pleochroism appearing in different directions, pay attention to the process. Avoid seeing pleochroism on the countertop, affecting the beauty of gems and reducing the value of gems. On the contrary, some gems have to highlight their pleochroism and show the change of gem color. This gem is Tanzanite. What are the characteristics of tanzanite 　　　　? Tanzanite is the strongest pleochroism among all gemstones. In addition, there are cordierite, spodumene and so on. Tanzanite is a gemstone produced in Tanzania, Africa. The mineral composition is zoisite, named after the place of origin. Tanzanite has strong pleochroism of purple-blue-purple red. The purple-blue-purple color change of tanzanite gives people a mysterious and unpredictable sense of beauty, presenting a romantic and enchanting scene, which is similar to the magnificent view of the African mountain Kilimanjaro at sunset. Commensurate. Mount Kilimanjaro in Tanzania, Africa, has the title of'Roof of Africa'. Due to the high altitude, the top of the mountain is covered with snow all year round. Whenever the sun goes down, the afterglow of the sunset and the blue sky reflect each other, rendering the world a fiery red. With the gradual fall of the night, the sky merges with natural colors such as red, blue, and purple, and the hue changes with the twilight, presenting a charming and magnificent picture that is unpredictable.　　　　 Tanzanite is a reduced version of the twilight scene of Mount Kilimanjaro in front of you. People love tanzanite because they love Mount Kilimanjaro, worship the magic of Kilimanjaro's nature and love the unique charm of tanzanite. This is a story-telling marketing method that people use the pleochroism of tanzanite to make consumers favor it.　　　　Tanzanite jewelry 　　　　 pleochroism also plays a role in gem identification. Pleochroism is a reflection of the heterogeneity of crystals. Only uniaxial crystals and biaxial crystals have pleochroism, which distinguishes them from equiaxed minerals and homogeneous glass. The different tones of tanzanite in different directions can clearly feel the dichroism of sapphire through visual observation-blue-light blue and above is the information about jewelry knowledge summarized by the author for you. The information comes from the Internet. If there is no Please forgive me, if you need to inlay, please go to the official website of jewelry inlay, and jewelry inlay is waiting for your inquiry!