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Chalcedon, chemický vzorec SiO2, je klencový minerál. Název je odvozen od starověkého města Chalkédón v Malé Asii, místa konání Chalkedonského koncilu.
Naleziště, Odrůdy & Vznik
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jako vlastnosti sio2 jsou minerál využití chemický vzorec starověkého tvoří jeho ze chalcedonu kámen koh achát barva šedá tvrdost lesk
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| Chalcedon | Barva | bílá, šedá... | 1.00 | infobox |
| Chalcedon | Chemický vzorec | SiO2 | 1.00 | infobox |
| Chalcedon | Hustota | 2,65 g ⋅ cm−3 | 1.00 | infobox |
| Chalcedon | Kategorie | Minerál | 1.00 | infobox |
| Chalcedon | Lesk | skelný až voskový | 1.00 | infobox |
| Chalcedon | Rozpustnost | KOH, HF | 1.00 | infobox |
| Chalcedon | Soustava | klencová | 1.00 | infobox |
| Chalcedon | Tvrdost | 6,5–7 | 1.00 | infobox |
| Chalcedon | Vryp | bílý | 1.00 | infobox |
| Chalcedon | Vzhled krystalu | krystaly | 1.00 | infobox |
| Chalcedon | Štěpnost | žádná | 1.00 | infobox |
| Chalcedon | related to Externí odkazy | Obrázky | 0.60 | section |
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