feldspar

As a noun 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 an adjective false is

(label) one of two states of a boolean variable; logic.

As nouns the difference between feldspar and amphibole

is that 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 while amphibole is (geology) a large group of structurally similar hydrated double silicate minerals, containing various combinations of sodium, calcium, magnesium, iron, and aluminium/aluminum.

As nouns the difference between fluorite and feldspar

is that fluorite is 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 a noun 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 an adjective undefined is

lacking a definition or value.

As nouns the difference between chert and feldspar

is that chert is (geology|uncountable) massive, usually dull-colored and opaque, quartzite, hornstone, impure chalcedony, or other flint-like mineral 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 feldspar and amphiboles

is that 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 while amphiboles is .

As nouns the difference between petalite and feldspar

is that petalite is 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 a proper noun clay

is .

As a noun 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.

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 geodes and feldspar

is that geodes is plural of geode while feldspar is 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.