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chalcedony

chalcedony

The blue-white shimmering gemstone

An onyx gemstone also belongs to the group of chalcedony

overview

Naming: The name chalcedony appears to be derived from the formerly independent city of Chalcedon, which is located on the Bosporus and is now only a small district of Istanbul. There were deposits of the gemstone there.
The Greeks called chalcedony the speaker’s stone because they believed that it helped with giving public speeches.
Mineral group: Chalcedony is a variety of quartz.
Color: Chalcedony is characterized by its blue-white to grayish shimmer. However, there are numerous colors in the chalcedony group.
Cut: To particularly emphasize its shimmer, chalcedony is often cut into a cabochon.

Color

The chalcedony has a blue-white to greyish shimmer.

purity

In the narrower sense, chalcedony is a translucent mineral with a matte, waxy sheen that appears in pastel colors such as blue-white or gray-white. There are both striped and monochrome variants. Sometimes beautiful patterns can be observed.

carat

The carat number of a gemstone indicates its weight. One carat (ct) corresponds to approximately 0.2 grams. In general, the heavier a gemstone, the more valuable it is.

cut

The gemstone, which has a Mohs hardness of 6.5 to 7, is usually cut into a cabochon shape, as this brings out its matte shimmer most beautifully.

An agate gemstone

Chalcedony as a collective term

One of the most famous representatives of the chalcedony group is agate, whose characteristic feature is its multi-colored banding. Onyx is the name for agate in the colors black and white.
Another member of the group is the green to blue-green aventurine, which has an impressively shimmering surface due to plate-shaped inclusions of foreign minerals.
Carnelian is an orange-red to brown-red variety of chalcedony.
The green heliotrope owes its nicknames blood jasper and bloodstone to its striking red speckles.

occurrence of chalcedony

Would you like a piece of jewelry with chalcedony? We would be happy to create a custom piece of jewelry for you, tailored to your needs.
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jewelry with chalcedony

Are you interested in a piece of jewelry with amber? At RENÉSIM we would be happy to make you a custom-made piece of jewelry. Please contact us by phone or using our contact form.