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Noun
1. quartzite
Wikipedia definition
2. QuartziteQuartzite is a hard, non-foliated metamorphic rock which was originally sandstone. Sandstone is converted into quartzite through heating and pressure usually related to tectonic compression within orogenic belts. Pure quartzite is usually white to gray, though quartzites often occur in various shades of pink and red due to varying amounts of iron oxide (Fe2O3). Other colors, such as yellow and orange, are due to other mineral impurities.
Read “Quartzite” on English Wikipedia
Read “珪岩” on Japanese Wikipedia
Read “Quartzite” on DBpedia

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