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2. Beryl - Wikipedia

   en.wikipedia.org/wiki/Beryl

   Red beryl has been known to be confused with pezzottaite, a caesium analog of beryl, found in Madagascar and, more recently, Afghanistan; cut gems of the two varieties can be distinguished by their difference in refractive index, and the rough crystals easily by their differing crystal systems (pezzottaite trigonal, red beryl hexagonal).

3. Red beryl - Wikipedia

   en.wikipedia.org/wiki/Red_beryl

   Red beryl, formerly known as bixbite and marketed as red emerald or scarlet emerald, is an extremely rare variety of beryl as well as one of the rarest minerals on Earth. [1] [2]: 19 The gem gets its red color from manganese ions embedded inside of beryllium aluminium cyclosilicate crystals. [1]

4. Goshenite (gem) - Wikipedia

   en.wikipedia.org/wiki/Goshenite_(gem)

   Goshenite is a colorless gem variety of beryl. [2] It is called the mother of all gemstones because it can be transformed into other like emerald , morganite , or bixbite . Goshenite is also referred to as the purest form of beryl since there are generally no other elements present in the stone. [ 3 ]

5. 18 Most Expensive Gemstones in the World - AOL

   www.aol.com/18-most-expensive-gemstones-world...

   Red beryl is an extremely rare gemstone. For every 150,000 diamonds mined, only one red beryl is found. A two-carat red beryl is considered to be as rare a find as a 40-carat diamond. The rare ...

6. Emerald - Wikipedia

   en.wikipedia.org/wiki/Emerald

   Emerald is a gemstone and a variety of the mineral beryl (Be 3 Al 2 (SiO 3) 6) colored green by trace amounts of chromium or sometimes vanadium. [2] Beryl has a hardness of 7.5–8 on the Mohs scale. [2] Most emeralds have many inclusions, [3] so their toughness (resistance to breakage) is classified as generally poor. Emerald is a cyclosilicate.

7. Aquamarine (gem) - Wikipedia

   en.wikipedia.org/wiki/Aquamarine_(gem)

   Aquamarine is a fairly common gemstone, [6] rendering it more accessible for purchase, compared to other gems in the beryl family. [7] Overall, its value is determined by weight, color, [5] cut, and clarity. [8] It is transparent to translucent and possesses a hexagonal crystal system. [9]