Chalcedony

Chalcedony owes its name to the ancient city of Chalcedon, now called Kadıköy, a district of the city of Istanbul. Depending on the context, the term chalcedony has different meanings. It can be understood as a general term that indicates the varieties of quartz that are made of microscopic or submicroscopic crystals, the so-called microcrystalline varieties of quartz. These include agate, jasper, chrysoprase, carnelian and onyx.
The term chalcedony also indicates the mineral itself, a fibrous and cryptocrystalline variety of quartz. It is a secondary origin mineral deriving from the alteration of the silicates of the encasing rocks. They form the filling of more or less large cavities, within igneous rocks especially in the basic ones (geodes); these cavities are produced by the expansion of gases and magma vapors. Zoned structure are frequent in chalcedony and mainly clear in varieties that have color differences in individual areas such as agate and onyx. When pure, the chalcedony is whitish-bluish gray in color; however, the coloring is very variable as a consequence of impurities. The chalcedony is translucent to almost opaque.
Widely used and appreciated in the ancient world, it was thought to come exclusively from Egypt and Arabia. It is mainly mined in Uruguay and southern Brazil. The purest masses come from Ireland, the Faroe Islands, Syria, the East Indies, Greenland and the island of Sri Lanka.

India

Apophyllite, Stilbite, Chalcedony
India
830g

€750.00 Ex Tax: €750.00

A natural conformation of remarkable beauty. The creation of Mother nature never cease to amaze us.Here we have a combination of three minerals, Apophyllite, Stilbite and Calcedony with unique shapes...

Showing 1 to 1 of 1 (1 Pages)
Chalcedony Cluster
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Brazil

Chalcedony Cluster
Brazil
4,300g

€450.00 Ex Tax: €450.00

Great example of Chalcedony with a beautiful green / blue color, coming from the Brazilian mines of Minas Gerais.Unusual and fascinating cluster formation of crystals on a matrix positioned on a woode..

Chalcedony sphere with candle
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Brazil

Chalcedony sphere with candle
Brazil
1,306g

€68.00 Ex Tax: €68.00

Exclusive candle holder made by carving a Chalcedony sphere.A characteristic and fascinating ornamental object that cannot be missing in the study of a mineral enthusiast...

Crystals of Apofillite and Calcedony
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India

Crystals of Apofillite and Calcedony
India
520g

€240.00 Ex Tax: €240.00

A vary special formation of Apophyllite crystals on Chalcedony stalactites from India.Appreciable the shape of tis mineral that brings us back to the crystals of a magnificent coral, perfect as a piec..

Showing 1 to 3 of 3 (1 Pages)

India

Apophyllite, Stilbite, Chalcedony
India
830g

€750.00 Ex Tax: €750.00

A natural conformation of remarkable beauty. The creation of Mother nature never cease to amaze us.Here we have a combination of three minerals, Apophyllite, Stilbite and Calcedony with unique shapes...

Chalcedony Cluster
Sold

Brazil

Chalcedony Cluster
Brazil
4,300g

€450.00 Ex Tax: €450.00

Great example of Chalcedony with a beautiful green / blue color, coming from the Brazilian mines of Minas Gerais.Unusual and fascinating cluster formation of crystals on a matrix positioned on a woode..

Chalcedony sphere with candle
Sold

Brazil

Chalcedony sphere with candle
Brazil
1,306g

€68.00 Ex Tax: €68.00

Exclusive candle holder made by carving a Chalcedony sphere.A characteristic and fascinating ornamental object that cannot be missing in the study of a mineral enthusiast...

Crystals of Apofillite and Calcedony
Sold

India

Crystals of Apofillite and Calcedony
India
520g

€240.00 Ex Tax: €240.00

A vary special formation of Apophyllite crystals on Chalcedony stalactites from India.Appreciable the shape of tis mineral that brings us back to the crystals of a magnificent coral, perfect as a piec..

Showing 1 to 4 of 4 (1 Pages)