Last Updated
：2025/11/20
feldspar
Noun
countable
uncountable
Japanese Meaning
長石：地殻の約60%を構成する多くの岩石形成鉱物の総称。アルカリ金属のアルミニウムシリケートであり、火成岩や深成岩の主要成分となる鉱物群。
Sense（1）
（ plural ）
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(mineralogy) 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.
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feldspar
The geologist identified feldspar and quartz in the hand sample before describing the rock's history.
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The geologist identified feldspar and quartz in the hand sample before describing the rock's history.
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