$38.00 USD

Price

$38.00 USD

Price

sedagems

6187

NATURAL CRYSTAL WITH INCLUSIONS TERMINATED70.60 CTS [MX9191]

6187

SKU
Dimensions (mm): x x mm
Weight (cts)
Colours

MINERAL GEM WORLD

CRYSTAL WITH INCLUSIONS

This is a natural untreated crystal from Brazil showing great terminations with a fiborous inclusion in the base-great specimen.

Weight 70.60 cts app

Size 46 x 18 x 11 mm app

Quartz grows in many environments along with many different minerals. These minerals, as well as watery solutions and gas bubbles, can be enclosed by the growing crystal.
Many minerals that would otherwise be chemically altered or dissolved when the local conditions change are protected from aggressive chemical agents when they have been embedded inside quartz crystals. Likewise, fragile minerals that are very soft, crumbly or that occur as fibers or thin needles survive inside. Other partially embedded minerals might get dissolved at a later stage and leave ghostlike hollow forms behind.

There are basically three ways inclusions can "get into the crystal":

The minerals have formed before the quartz. The growing quartz crystals engulfs them and the original form of the included minerals is preserved. These inclusions are called protogenetic. Included fibers than run through the entire crystal at random orientations are typical examples.

Quartz crystals and the included minerals grow simultaneously. These inclusions are called syngenetic. The shape of the included minerals often deviates from the typical forms and habits that develop during unhindered growth. Crystals may be distorted beyond recognition and a non-destructive identification may pose a real problem even for a mineralogist.
Sometimes inclusions cause the formation of phantoms. Here the quartz crystal might have been partially encrusted by another mineral when growth halted transiently and continued later, such a case could be considered a syngenetical formation that got overgrown.

Minerals can get into another mineral by exsolution. When the conditions during crystal growth allowed the incorporation of elements into the crystal lattice that are incompatible with the crystal structure at different temperatures or pressures, these elements may separate from the lattice to form new minerals once the conditions change. Such inclusions are called epigenetic. Very often these inclusions are specifically oriented with respect to the crystallographic axes of the main crystal. The best example of a quartz with epigenetic inclusions is rose quartz.

SKU
Dimensions (mm): x x mm
Weight (cts)
Colours

MINERAL GEM WORLD

CRYSTAL WITH INCLUSIONS

This is a natural untreated crystal from Brazil showing great terminations with a fiborous inclusion in the base-great specimen.

Weight 70.60 cts app

Size 46 x 18 x 11 mm app

There are basically three ways inclusions can "get into the crystal":

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Hi Welcome to the Sedagems store, Run by Paul Sedawie and specializing in Australian sapphires and gems stones he has collected on his many buying trips world wide. All stock has a money back guarantee as your continued business is our business.

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19025 Feedback

kewpie
on 11 Nov, 2024

Positive

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royrock
on 3 Nov, 2024

Positive

Beautiful agate piece , and as always fast efficient service from Sedagems

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frank1942
on 2 Nov, 2024

Positive

Nice

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maiziemaizie
on 31 Oct, 2024

Positive

Gorgeous stones, very happy

71 CTS FIRE AGATE ROUGH PARCEL

maiziemaizie
on 31 Oct, 2024

Positive

Gorgeous stone, very happy

22.9CTS VARASCITE 'SPIDER WEB' AUSTRALIA [MGW 4616]

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