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> Minerals > Chalcedony
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Chalcedony
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| Chalcedony
 Ametista do Sul (São Gabriel), Alto Uruguai region, Rio Grande do Sul, Brazil
Item-No.: MIN6194
Price: 145.00 EUR
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| Fluorapatite, Chalcedony
Cerro de Mercado Mine, Victoria de Durango, Cerro de los Remedios, Mun. de Durango, Durango, Mexico
Item-No.: MIN0094
Price: 122.00 EUR
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| Synonyms: |
Ceracathes, Cerachates, Chalcedone, Chalcedonite, Chalcedononyx, merlinite |
| Variety of: |
Quartz |
| IMA Status: |
Not recognised as mineral |
| Classification: |
Oxides |
| Chemical formula: |
SiO2 |
| Crystal system: |
Trigonal - microcrystalline, cryptocrystalline |
| Density (g/cm3): |
2,6 measured |
| Tenacity: |
Brittle |
| Cleavage: |
Non Observed |
| Fracture: |
Conchoidal, Sub-Conchoidal |
| Hardness (Mohs): |
6,5 - 7 |
| Colour: |
Colorless, white, gray, blue, any color due to embedded minerals |
| Lustre: |
Waxy, Dull |
| Streak: |
White |
| First recorded locality: |
Kadıköy (Chalcedon), Istanbul Province, Marmara Region, Turkey |
| Application: |
Famous as a semi precious jewelry stone |
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