Fulgurite is lightening that has struck sand. The massive charge from the lightening that was used to create the fused sand makes this a high vibrational crystal.
This listing is for 1 pc. Sizes varies. Approx. 1-2"
This listing is for a variety of fulgurite called singing fulgurite, which produces a high pitched sound when two pieces are struck together.
There is another variety of fulgurite called blonde fulgurite, that gets its name from the blond sands of the Sahara Desert.
Please see my other listing for blonde fulgurite if you are interested.