There are many gemstones that can produce starlight effect in nature. Ayni paytda, lar bor 10 kinds of gems known as: sapfir, yoqut, almanin, berill, akvaarin, shayton, diapid, arqon, columnar and enstatite pyroxene. Ular orasida, 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 dog '. 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, va olti nurli yulduz nuri effekti hosil bo'ladi. Bu mushuk ko'zlari bilan kesishgan uchta to'plamga teng.
Tabiiy yoqut va safirlarda, ko'pincha mayda igna shaklidagi rutillar juda ko'p (Ti02 komponenti) yoki kichik quvurli yoriqlar. Chunki qizil va sapfir ikkalasi ham trigonal kristall tizimdir, igna shaklidagi rutil yoki quvurli yoriqlar ko'pincha olti burchakli yo'nalish bo'ylab yo'naltiriladi. Shu sababli, marvarid yarim sharsimon tana marvaridiga kesilganda, ko'pincha olti yoki hatto o'n ikki marta yulduzlar nuri bor. , Shunday qilib, toshlar yanada chiroyli va harakatchan ko'rinadi. Qimmatbaho toshning shaffofligi yomon bo'lganda va rangi biroz quyuqroq bo'ladi, yulduz nurining ta'siri yanada aniqroq. Shu sababli, yaxshi shaffoflik va rangga ega bo'lgan qizil va safir ko'pincha yulduz nuri effektini ta'minlash o'rniga prizmatik qimmatbaho toshlarga sayqallanadi..
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