corundum

As nouns the difference between boron and corundum

is that boron is the chemical element (symbol b) with an atomic number of 5; a metalloid while corundum is (mineral) an extremely hard mineral, a form of aluminum oxide with the chemical formula al]]₂[[oxygen|o₃, that occurs in the form of the gemstones sapphire and ruby; it is used as an abrasive.

As nouns the difference between corundum and null

is that corundum is (mineral) an extremely hard mineral, a form of aluminum oxide with the chemical formula al]]₂[[oxygen|o₃, that occurs in the form of the gemstones sapphire and ruby; it is used as an abrasive while null is zero, nil; the cardinal number before einn.

In mineral|lang=en terms the difference between corundum and feldspar

is that corundum is (mineral) an extremely hard mineral, a form of aluminum oxide with the chemical formula al]]₂[[oxygen|o₃, that occurs in the form of the gemstones sapphire and ruby; it is used as an abrasive while feldspar is (mineral) any of a large group of rock-forming minerals that, together, make up about 60% of the earth's outer crust the feldspars are all aluminum silicates of the alkali metals sodium, potassium, calcium and barium feldspars are the principal constituents of igneous and plutonic rocks.

As nouns the difference between corundum and feldspar

is that corundum is (mineral) an extremely hard mineral, a form of aluminum oxide with the chemical formula al]]₂[[oxygen|o₃, that occurs in the form of the gemstones sapphire and ruby; it is used as an abrasive while feldspar is (mineral) any of a large group of rock-forming minerals that, together, make up about 60% of the earth's outer crust the feldspars are all aluminum silicates of the alkali metals sodium, potassium, calcium and barium feldspars are the principal constituents of igneous and plutonic rocks.

As nouns the difference between hessonite and corundum

is that hessonite is an orange, cinnamon, or pinkish garnet while corundum is (mineral) an extremely hard mineral, a form of aluminum oxide with the chemical formula al]]₂[[oxygen|o₃, that occurs in the form of the gemstones sapphire and ruby; it is used as an abrasive.

As nouns the difference between corundum and diamond

is that corundum is an extremely hard mineral, a form of aluminum oxide with the chemical formula Al₂O₃, that occurs in the form of the gemstones sapphire and ruby; it is used as an abrasive while diamond is a glimmering glass-like mineral that is an allotrope of carbon in which each atom is surrounded by four others in the form of a tetrahedron.

As an adjective diamond is

made of, or containing diamond, a diamond or diamonds.

As a verb diamond is

to adorn with or as if with diamonds.

As a proper noun Diamond is

{{given name|female|from=English}} of modern usage, from the name of the gem.

As nouns the difference between alumina and corundum

is that alumina is aluminum oxide used especially in mining, material sciences and ceramics while corundum is an extremely hard mineral, a form of aluminum oxide with the chemical formula Al₂O₃, that occurs in the form of the gemstones sapphire and ruby; it is used as an abrasive.

As nouns the difference between beryl and corundum

is that beryl is a mineral of pegmatite deposits, often used as a gemstone while corundum is an extremely hard mineral, a form of aluminum oxide with the chemical formula Al₂O₃, that occurs in the form of the gemstones sapphire and ruby; it is used as an abrasive.

As an adjective beryl

is of a dull blueish green colour.

As a proper noun Beryl

is {{given name|female|from=English}} derived from the gem beryl.

As nouns the difference between carbuncle and corundum

is that carbuncle is a deep-red or fiery colored garnet or other dark red precious stone, especially when cut cabochon while corundum is an extremely hard mineral, a form of aluminum oxide with the chemical formula Al₂O₃, that occurs in the form of the gemstones sapphire and ruby; it is used as an abrasive.

As nouns the difference between corundum and mullite

is that corundum is (mineral) an extremely hard mineral, a form of aluminum oxide with the chemical formula al]]₂[[oxygen|o₃, that occurs in the form of the gemstones sapphire and ruby; it is used as an abrasive while mullite is (mineralogy) an orthorhombic-dipyramidal mineral containing aluminum, oxygen, and silicon.

As a noun corundum is

(mineral) an extremely hard mineral, a form of aluminum oxide with the chemical formula al]]₂[[oxygen|o₃, that occurs in the form of the gemstones sapphire and ruby; it is used as an abrasive.