mineral chalcedony

Chalcedony quartz: The mineral Chalcedony information

Chalcedony is not scientifically its own mineral species, but rather a form of Quartz in microcrystalline form. However, the name is an old name, and almost all mineral reference guides and collectors distinguish Chalcedony separately from Quartz.

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Chalcedony: The gemstone Chalcedony information and

Chalcedony is found in all types of colors, and its varieties are named based on color. The variety Agate is a multicolored form, well known for its distinctive

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chalcedony | mineral | Britannica

chalcedony, a very fine-grained (cryptocrystalline) variety of the silica mineral quartz (q.v.). A form of chert, it occurs in concretionary, mammillated, or stalactitic forms of waxy lustre and has a compact fibrous structure, a fine splintery

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silica mineral - Chalcedony | Britannica

silica mineral - silica mineral - Chalcedony: Chalcedony is a white, buff, or light tan, finely crystallized or fibrous quartz that forms rounded crusts, rinds, or stalactites (mineral deposits suspended from the roofs of caverns) in volcanic and sedimentary rocks as a precipitate from moving solutions. If chalcedony is conspicuously colour-banded, it may be called agate; onyx

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Chalcedony/Chalcedony Mineral Specimens/UnderGround ...

Chalcedony is a variety of Quartz, defined as cryptocrystalline, meaning individual crystals are too small to see, even with a microscope. Though it is not technically its own mineral species, the name has been used and implied for ages, with almost all mineral reference guides, in print and online, and collectors, referencing Chalcedony independently from Quartz.

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Agate chalcedony: The mineral Agate information and

Agate is the banded form of the mineral Chalcedony, which is a microcrystalline variety of Quartz.Agate is the most varied and popular type of Chalcedony,

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Blue Chalcedony: Mineral information, data and localities.

- Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality.

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Quartz Mineral Data

Very common mineral found world wide. Link to MinDat.org Location Data. Name Origin: From the German "quarz", of uncertain origin. Name Pronunciation: Quartz : Synonym: Agate - banded variety of chaledony : Amethyst - purple : Avanturine - feebly translucent chalcedony : Carnelian - flesh red chalcedony : Cat's Eye - chatoyant ...

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Chalcedony: Mineral information, data and localities.

Most chalcedony contains small amounts of the silica mineral Mogánite, usually between 1% and 20% (Heaney and Post, 1992). Aging slowly converts the mogánite into quartz and results in mogánite-free chalcedony (Moxon, 2004). Chalcedony contains small amounts of water, both as molecular water and bound in silanole (Si-OH) groups (Frondel ...

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silica mineral - Chalcedony | Britannica

silica mineral - silica mineral - Chalcedony: Chalcedony is a white, buff, or light tan, finely crystallized or fibrous quartz that forms rounded crusts, rinds, or stalactites (mineral deposits suspended from the roofs of caverns) in volcanic and sedimentary rocks as a precipitate from moving solutions. If chalcedony is conspicuously colour-banded, it may be called agate; onyx

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Chalcedony - DesertUSA

Chalcedony Gemstone. Chalcedony, also spelled calcedony, is a very fine-grained (cryptocrystalline) variety of the silica mineral quartz. It has a waxy luster and appears in a great variety of colors -- usually blue-white, buff, light tan, gray,

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Chalcedony/Chalcedony Mineral Specimens/UnderGround ...

Chalcedony is a variety of Quartz, defined as cryptocrystalline, meaning individual crystals are too small to see, even with a microscope. Though it is not technically its own mineral species, the name has been used and implied for ages, with almost all mineral reference guides, in print and online, and collectors, referencing Chalcedony independently from Quartz.

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Chalcedony - International Colored Gemstone Association

Chalcedony is another of the many treasures we get from the quartz family of minerals. Amethyst, citrine, rose quartz and rock crystal are also beautiful representatives of the mineral quartz. Chalcedony is a microcrystaline and cryptocrystaline quartz that is semitransparent to opaque.

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Chrome-Chalcedony: Mineral information, data and

A variety of Chalcedony A variety of chalcedony colored deep green by Cr compounds. (Compare with the more common chrysoprase variety of chalcedony, which is colored by nickel.) Chrome chalcedony found in an ancient Roman gem collection may have come from one of the chromium deposits in what is now Turkey.

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Blue Chalcedony: Mineral information, data and localities.

- Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality.

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Quartz Mineral Data

Very common mineral found world wide. Link to MinDat.org Location Data. Name Origin: From the German "quarz", of uncertain origin. Name Pronunciation: Quartz : Synonym: Agate - banded variety of chaledony : Amethyst - purple : Avanturine - feebly translucent chalcedony : Carnelian - flesh red chalcedony : Cat's Eye - chatoyant ...

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The Gemstone Chrysoprase - minerals

The color of Chrysoprase can be lighter to more intense apple-green, though deeper colors are more desirable. Once the color reaches a dark threshold, the gemstone is no longer identified as Chrysoprase, but rather as a variety of Chalcedony known as Prase.Lighter-colored Chrysoprase is a much more popular gemstone material over dark green Prase.

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Tips for Cleaning Your Minerals

2018-2-21 · Most collectors collect minerals because they find them interesting and consequently want to make their collection interesting to everyone they come in contact with, and it is well to remember that a lovely specimen should be kept clean and sparkling, so do wash their faces once in a while. CLEANING CHALCEDONY Oct77 News Nuggets

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chalcedony - MINERALMINERS.COM: Mineral

2021-5-15 · CHALCEDONY OCCURRENCE AND DIAGNOSTIC FEATURES. Agate is a variety of chalcedony, which is the general term applied to fibrous cryptocrystalline quartz varieties.. Chalcedony is a mineral generally of

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Chalcedony | Minerals Wiki | Fandom

2021-11-25 · The chalcedony group is a well-known group of minerals including agate, heliotrope, onyx, and carnelian. Chalcedony is common in geodes and in cameos and intaglios. Main article- Agate Agate is a banded variety of chalcedony. Agate is common in metamorphic and volcanic rocks. It and jade are two common minerals for carving. Mexican agate is sometimes called

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Chalcedony - International Colored Gemstone Association

Chalcedony is another of the many treasures we get from the quartz family of minerals. Amethyst, citrine, rose quartz and rock crystal are also beautiful representatives of the mineral quartz. Chalcedony is a microcrystaline and cryptocrystaline quartz that is semitransparent to opaque.

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CHALCEDONY - Raven Crystals

2022-2-7 · Chalcedony occurs in a variety of crystalline formations such as the interior lining of geodes, or as botryoidal, stalactitic, or irregular shaped mineral aggregates. Chalcedony’s hardness is rated at 7 on the Moh’s scale of mineral hardness. Chalcedony color and patterns range widely dependent on the source location of the mineral deposit ...

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Chalcedony Mineral Specimens

Chalcedony mineral specimens with quartz druse at mineralminers: your on-line link direct to the chalcedony mines for natural chalcedony mineral specimens in colorless and natural color pale blue chalcedony, some chalcedony with

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Chrome-Chalcedony: Mineral information, data and

A variety of Chalcedony A variety of chalcedony colored deep green by Cr compounds. (Compare with the more common chrysoprase variety of chalcedony, which is colored by nickel.) Chrome chalcedony found in an ancient Roman gem collection may have come from one of the chromium deposits in what is now Turkey.

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Blue Chalcedony: Mineral information, data and localities.

- Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality.

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The Gemstone Chrysoprase - minerals

The color of Chrysoprase can be lighter to more intense apple-green, though deeper colors are more desirable. Once the color reaches a dark threshold, the gemstone is no longer identified as Chrysoprase, but rather as a variety of Chalcedony known as Prase.Lighter-colored Chrysoprase is a much more popular gemstone material over dark green Prase.

Read More

Quartz Mineral Data

Very common mineral found world wide. Link to MinDat.org Location Data. Name Origin: From the German "quarz", of uncertain origin. Name Pronunciation: Quartz : Synonym: Agate - banded variety of chaledony : Amethyst - purple : Avanturine - feebly translucent chalcedony : Carnelian - flesh red chalcedony : Cat's Eye - chatoyant ...

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Tips for Cleaning Your Minerals

2018-2-21 · Most collectors collect minerals because they find them interesting and consequently want to make their collection interesting to everyone they come in contact with, and it is well to remember that a lovely specimen should be kept clean and sparkling, so do wash their faces once in a while. CLEANING CHALCEDONY Oct77 News Nuggets

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