PURPOSE: To provide the subject polycrystalline type abrasive grains containing low pressure baron nitride in the grains in an oriented state, capable of resisting against severe use conditions such as heavy abrasion or high speed abrasion, long in service life, little in the deterioration of the abrasive ability, and useful for abrading tools, etc.

CONSTITUTION: The objective abrasive grains are constituted by containing low pressure boron nitride in the grains preferably in an amount of 0.1-5wt.% in an oriented state.