Brown fused alumina or brown aluminum oxide is characterized by its high purity, high bulk density, strong self-sharpening, good toughness, ultra-low content of the magnetic materials. Brown aluminum oxide can be made into grinding tools, brown aluminum oxide is characterized by sharp grinding, low heat generation ratio, high grinding rate and few coating in the using course, and the sintering grinding tools that is characterized by deep blue color after firing, without resillage, without rust and so on, whale "Brown Fused Alumina is applicable to make ceramic and resinoid high bonded abrasive tools, grinding abrasive and polishing materials, as well as producing the high grade refractory materials.