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Chalcedony

Chalcedony - the chemical formula of SiO2, is an arched mineral.

Chalcedony is usually formed in cavities of rocks of various kinds, but mainly in cooling magma (filling of basalt and melafyr almond cavities), where it is formed at low temperatures as a precipitate of silicate solutions. Occasionally we encounter chalcedony, which is formed as a dehydration product of opal. It can also be found on the cracks of snakes, or it forms tubers in limestones. Its occurrence is therefore abundant. Chalcedony is a cryptocrystalline variety of quartz - it is composed of such small crystals that it appears to be solid. It consists of inserts, bark, almonds, geodes. From the cavities, layers with a kidney-like or grape-like surface are known, which often also forms neat stalactites and bud-like aggregates. During microscopic cutting, it is possible to observe the microcrystals of which chalcedony is composed. The crystals are usually parallel or radially arranged. The best known varieties of chalcedony include agate, carnelian, chrysoprase, jasper, onyx, sardonyx or heliotrope.

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Chalcedony blue 235g, Turkey

Natural chalcedony blue - a raw mineral in the rockWeight: 235 gDimensions: 7.63 x 6.35 x 4.37 cmColor: blueCountry...
Kč1,180.00

Chalcedony blue 313g, Turkey

Natural chalcedony blue - a raw mineral in the rockWeight: 313 gDimensions: 10.9 x 6.08 x 5.03 cmColor: blueCountry...
Kč1,570.00

Chalcedony blue 387g, Turkey

Natural chalcedony blue - a raw mineral in the rockWeight: 387 gDimensions: 10 x 6.27 x 4.54 cmColor: blueCountry of...
Kč1,930.00

Chalcedony blue 188g, Turkey

Natural chalcedony blue - raw mineral in the rockWeight: 188 gDimensions: 6.05 x 5.90 x 3.94 cmColor: blueCountry of...
Kč940.00

Chalcedony blue 191g, Turkey

Natural chalcedony blue - raw mineral in the rockWeight: 191 gDimensions: 6.63 x 5.08 x 4.09 cmColor: blueCountry of...
Kč960.00

Chalcedony blue 181g, Turkey

Natural chalcedony blue - raw mineral in the rockWeight: 181 gDimensions: 6.76 x 5.85 x 3.40 cmColor: blueCountry of...
Kč900.00

Chalcedony blue 202g, Turkey

Natural chalcedony blue - raw mineral in the rockWeight: 202 gDimensions: 6.61 x 5.16 x 4.07 cmColor: blueCountry of...
Kč1,000.00

Chalcedony blue 255g, Turkey

Natural chalcedony blue - raw mineral in the rockWeight: 255 gDimensions: 6.33 x 6.23 x 4.83 cmColor: blueCountry of...
Kč1,270.00

Chalcedony blue 303g, Turkey

Natural chalcedony blue - raw mineral in the rockWeight: 303 gDimensions: 8.51 x 5.63 x 5.21 cmColor: blueCountry of...
Kč1,500.00
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