Mineralogy term for silicon dioxide, often referring to quartz or silica-rich rocks.
Silica is important as a raw material for glass.
High-quality silica is mined in this region.
二酸化ケイ素 is the chemical name for silicon dioxide; 珪石 is the mineralogical or industrial term.
Standard kanji spelling for silica in mineralogy contexts.
Mixed kanji-katakana spelling sometimes used for clarity.
Alternate kanji spelling using 硅, also seen in technical literature.
Compound of 珪 (kei, 'silicon') and 石 (seki, 'stone'). The kanji 珪 is used specifically for silicon in mineral names.