Black Tourmaline does not absorb negative energy, it repels it. It is the best crystal to use against the ill effects of low frequency and high frequency electromagnetic waves (EMF) and protects against smog, radiation, psychic attacks and repels all kinds of negative energy. It grounds energy and is a valuable stone for crises and/or for periods of extreme stress. It can help defend against debilitating diseases. Black tourmaline is a wonderful stone for coping with grief and stress due to intense difficulty.
These are rough, black tourmaline pieces.
They are sold individually and measure approximately, 1″ to 1 1/4″. Each stone is different and unique.