Its chemical constituents include iron and aluminum and calcium are slack and Chrome

The most popular types of stone

  It's yellowy color found tourmaline.

Blue ink inclined tourmaline.

Black light tourmaline.

Brown tourmaline.

Pink and purple color tourmaline.
Green and olive colored tourmaline.

Recipe for cast iron ink color tourmaline.


Brazilian blue tourmaline.
Features include a few special things tourmaline.