Emerald Day, Ruby Night
The stone belongs to the Chrysoberyl family and was first discovered in 1830 in the Russian "Ural", named after Alexander Nikolayevich who later became the Russian tsar.
The stone belongs to the Chrysoberyl family and was first discovered in 1830 in the Russian "Ural", named after Alexander Nikolayevich who later became the Russian tsar.
And lived between 1818 and 1881.
There are stories that this stone was said to have been found on the day of the Russian Tsar's birth, so in his honor the name was placed on it and has long been recognized as a special stone and official jewel of the Russian Empire at the time of the Russian royal green. And it's been red.
Interestingly, the stone was discovered by a French mineralogist named Gustaf and at first thought it was emerald. There are also emerald mines near the "TOKOVAYA River" near the Liverpool
Interestingly, the stone was discovered by a French mineralogist named Gustaf and at first thought it was emerald. There are also emerald mines near the "TOKOVAYA River" near the Liverpool
. 
Alexandrite is one of the rarest colored gems in the world and its high quality variants are very expensive. The rarity of this rock is due to the chemical composition of the elements, which are often found as rare and rare elements in nature.
The combination of aluminum and beryllium and coloring elements such as chromium, vanadium, iron and titanium gives rise to a unique stone with varying colors of light.
Alexandrite stone is actually a stone with color change phenomenon. This change has made this rock popular and special. Green in the daylight and red in the artificial light of the night have earned the title of Emerald and Sapphire.
Alexandrite is one of the rarest colored gems in the world and its high quality variants are very expensive. The rarity of this rock is due to the chemical composition of the elements, which are often found as rare and rare elements in nature.
The combination of aluminum and beryllium and coloring elements such as chromium, vanadium, iron and titanium gives rise to a unique stone with varying colors of light.
Alexandrite stone is actually a stone with color change phenomenon. This change has made this rock popular and special. Green in the daylight and red in the artificial light of the night have earned the title of Emerald and Sapphire.
It is noteworthy that sometimes because of Alexandrite's fame, the name change is called the "Alexsandrite effect", which sometimes confuses non-specialists. Other stones, of course, have the same color change, which sometimes bears the name of Alexandria.
Nowadays, this precious gem is available in both Flux and Czochralski methods, causing confusion when purchasing the gemstones, which requires a skilled gemstone.
Nowadays, this precious gem is available in both Flux and Czochralski methods, causing confusion when purchasing the gemstones, which requires a skilled gemstone.
One of the rarest Alexandrians is a four-pointed star. Which is very rare.
Mining of Russian Ural mines is now completed, and natural stones in the market come from Sri Lanka, East Africa and Brazil. The Russian government, of course, maintains intact reserves of previously extracted rock in secret and national capital.
This stone has severe Pleochroism, which can be detected by special instruments, and can be detected in green, yellow and red. The orange depends on the viewing angle.
This stone is 8.5 hard (Moh) with good resistance to impact, heat, light and chemicals to make beautiful jewelry.
Refrence:IGI-GIA-HRD
Amir Kazem Kefayati
Gemologist (G.G)
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