Siberite
is an obsolete
term for a lilac, lavender, violet or violet-red to
purple variety of Elbaite,
Tourmaline.
It was named in 1799
by C. Lermina for an occurance in Siberia. It was
originally described as an opaque variety of Rubellite
but later became a description for any lavender
to purple variety of Tourmaline.