lord shiva mentions in shiv puran that rudraksh are available in four
colours viz. white, red, yellow and black which shall be worn by the
four respective casts viz. brahmins, kshatriyas, vaisyas and shudras.
however, most of the rudraksh available in the world are in red or
yellow colours only. black and white rudraksh are very rare out of
which black is not preferred. white rudraksh has become so extinct
that it is rarely available.
