dazzles jewellery What are the peculiarities of the names of rubies and sapphires?

I modern tid, when science and technology are advanced, most gem names have precise meanings. Rubin (English name Ruby) is defined as a red corundum gemstone. Any other red gemstone, no matter how bright and cute it is, kan inte kallas “rubin”. It can only be calledRed XX Stone”. The evolution of the term sapphire (English name Sapphire) is more complicated, som är, it firstly refers to various blue gemstones to specifically refers to blue corundum gemstones; in recent years, this meaning has changed to refer to gem-grade corundum. In terms of corundum gemstones other than red (including blue, ljusblå, grön, yellow and colorless, etc.). Därför, the yellow or colorless varieties should be called yellow sapphire and colorless sapphire respectively. Förresten, in the jewelry industry of Hong Kong, Macau and Taiwan, rubies and sapphires are calledcorundum ruby”, “corundum sapphire”, eller helt enkelt “rubin” och “safir”. Both red and sapphire belong to the trigonal crystal system, and the crystals are mostly columnar or barrel-shaped. The color of gems is pure red, klarröd, blodröd, purple red or rose red, och kallas också “rose purple gem”. Bland dem, de “duva blodröd” ruby ​​is the most precious. Sapphire is indigo, mutual, blå, himmelsblå, ljusblå, grön, gul, etc. The bright sky blue with uniform tone is the best. Both red and sapphire are transparent to translucent, med glasglans, and have obvious pleochroism under the dichroic mirror; the hardness is 9, the density is 4g/cm3; the shell-shaped fracture, no cleavage; under ultraviolet light, the ruby There is obvious red fluorescence; sapphires do not fluoresce except for individual varieties produced in Sri Lanka and Kashmir.

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