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

Udgivet den af Kingjy
In modern times, 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, cannot be called “ruby”. It can only be called “Red XX Stone”. The evolution of the term sapphire (English name Sapphire) is more complicated, det er, 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, light blue, green, yellow and colorless, osv.). Derfor, the yellow or colorless varieties should be called yellow sapphire and colorless sapphire respectively. By the way, in the jewelry industry of Hong Kong, Macau and Taiwan, rubies and sapphires are called “corundum ruby”, “corundum sapphire”, or simply “ruby” og “sapphire”. 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, bright red, blood red, purple red or rose red, and is also called “rose purple gem”. Blandt dem, the “pigeon blood red” ruby ​​is the most precious. Sapphire is indigo, mutual, blå, sky blue, light blue, green, gul, osv. The bright sky blue with uniform tone is the best. Both red and sapphire are transparent to translucent, with glass luster, 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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