Chrysoberyl is made up of three kinds of stones: Chrysoberyl, Alexandrite, Cat’s Eye.
When aluminum and beryllium are replaced by iron, the colour of the stone is yellow-green, yellow-brown, olive-green, grey-green, colourless to brownish and is called chrysoberyl.
When aluminum is replaced by chromium, the stone is called alexandrite. It is the rarest variety of Chrysoberyl.
To learn more about Chrysoberyl, see Mindat.org->
