A form of amorphous silica found in several varieties, e.g. flint.
| 单词 | θ7020 |
| 释义 | the world > the earth > minerals > types of mineral > silicates > tectosilicate > [noun] > quartz > cryptocrystalline quartz > chert (11) chert1686 A form of amorphous silica found in several varieties, e.g. flint. hornstone1728 A compact siliceous rock, resembling flint, but more brittle; chert. Subcategories:— aventurine (3) — jasper (5) — others (1) |
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