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AMETHYST 'TWINNING' STONE BRAZIL4.89 CTS [ST6193 ]
- SKU
- Dimensions (mm)
- x x mm
- Weight (cts)
- Certified Gemstones
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- Colours
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SEDA GEMS
AMETHYST TWINNING STONE
This is a natural stone which has some interesting lines in it from its formation.
Mined in Brazil.
Well polished
Nice collectors stone.
Weight 4.89 cts app
Size 14 x 12 x 4 mm app
TWINNING
Twinning form as a result of an error during crystallization. Instead of a "normal" single crystal, twins will often appear doubled where two crystals appear to be growing out of or into each other, like Siamese twins. Some twins however are not even identifiable outwardly and some minerals in fact have been found to be just a twinned variety of another mineral. Accidental relationships are not considered twins, such as when two distinct crystals grow more or less randomly side-by-side or toward each other, etc. Also epitaxial overgrowths are also not twins. These occur when one mineral of similar structure, but different chemistry, grows onto and "continues" the earlier mineral's crystal.. Twins are recognized by penetration angles or notches in the crystal, mirror planes that do not normally occur on a specific mineral and crystallographic techniques not normally available to the average collector. Twinning often has a dramatic effect on the outward symmetry of the mineral either by raising or lowering the symmetry. Twinning can make an orthorhombic mineral appear hexagonal or make a trigonal mineral appear monoclinic.
Amethyst is a purple form of quartz and it is the Birthstone associated with February..Amethyst occurs in primary hues from a light slightly-pinkish violet to a deep grape purple. Amethyst may exhibit one or both secondary hues, red and/or blue. The ideal grade is called "Deep Siberian" and has a primary purple hue of around 75–80 percent, 15–20 percent blue and (depending on the light source) red secondary hues
| Provider | Destination | Cost |
|---|---|---|
| Registered Shipping Default |
Rest of World
21 days
|
first item
per additional item
shipping capped at
|
| FedEx |
Rest of World
10 days
|
first item
per additional item
shipping capped at
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| Registered Shipping Default |
Australia
14 days
|
first item
per additional item
shipping capped at
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| Registered Shipping Default |
Chile
21 days
|
first item
per additional item
shipping capped at
|
| Registered Shipping Default |
Czechia
21 days
|
first item
per additional item
shipping capped at
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| Registered Shipping Default |
Finland
21 days
|
first item
per additional item
shipping capped at
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| Registered Shipping Default |
France
21 days
|
first item
per additional item
shipping capped at
|
| Registered Shipping Default |
Italy
21 days
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first item
per additional item
shipping capped at
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| Registered Shipping Default |
Poland
21 days
|
first item
per additional item
shipping capped at
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| Registered Shipping Default |
Spain
21 days
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first item
per additional item
shipping capped at
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| Registered Shipping Default |
Sweden
21 days
|
first item
per additional item
shipping capped at
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| Registered Shipping Default |
United Kingdom
21 days
|
first item
per additional item
shipping capped at
|
| Registered Shipping Default |
United States of America
21 days
|
first item
per additional item
shipping capped at
|
| Express Shipping |
Australia
4 days
|
first item
per additional item
shipping capped at
|
| FedEx |
Chile
7 days
|
first item
per additional item
shipping capped at
|
| Express Shipping |
Czechia
14 days
|
first item
per additional item
shipping capped at
|
| Express Shipping |
Finland
14 days
|
first item
per additional item
shipping capped at
|
| FedEx |
Finland
7 days
|
first item
per additional item
shipping capped at
|
| Express Shipping |
France
14 days
|
first item
per additional item
shipping capped at
|
| Express Shipping |
Italy
14 days
|
first item
per additional item
shipping capped at
|
| FedEx |
Italy
7 days
|
first item
per additional item
shipping capped at
|
| Express Shipping |
Poland
14 days
|
first item
per additional item
shipping capped at
|
| FedEx |
Poland
7 days
|
first item
per additional item
shipping capped at
|
| Express Shipping |
Spain
14 days
|
first item
per additional item
shipping capped at
|
| FedEx |
Spain
7 days
|
first item
per additional item
shipping capped at
|
| Express Shipping |
Sweden
14 days
|
first item
per additional item
shipping capped at
|
| FedEx |
Sweden
7 days
|
first item
per additional item
shipping capped at
|
| FedEx |
United Kingdom
7 days
|
first item
per additional item
shipping capped at
|
| FedEx |
United States of America
7 days
|
first item
per additional item
shipping capped at
|
- SKU
- Dimensions (mm)
- x x mm
- Weight (cts)
- Certified Gemstones
- No
- Colours
-
SEDA GEMS
AMETHYST TWINNING STONE
This is a natural stone which has some interesting lines in it from its formation.
Mined in Brazil.
Well polished
Nice collectors stone.
Weight 4.89 cts app
Size 14 x 12 x 4 mm app
TWINNING
Twinning form as a result of an error during crystallization. Instead of a "normal" single crystal, twins will often appear doubled where two crystals appear to be growing out of or into each other, like Siamese twins. Some twins however are not even identifiable outwardly and some minerals in fact have been found to be just a twinned variety of another mineral. Accidental relationships are not considered twins, such as when two distinct crystals grow more or less randomly side-by-side or toward each other, etc. Also epitaxial overgrowths are also not twins. These occur when one mineral of similar structure, but different chemistry, grows onto and "continues" the earlier mineral's crystal.. Twins are recognized by penetration angles or notches in the crystal, mirror planes that do not normally occur on a specific mineral and crystallographic techniques not normally available to the average collector. Twinning often has a dramatic effect on the outward symmetry of the mineral either by raising or lowering the symmetry. Twinning can make an orthorhombic mineral appear hexagonal or make a trigonal mineral appear monoclinic.
Amethyst is a purple form of quartz and it is the Birthstone associated with February..Amethyst occurs in primary hues from a light slightly-pinkish violet to a deep grape purple. Amethyst may exhibit one or both secondary hues, red and/or blue. The ideal grade is called "Deep Siberian" and has a primary purple hue of around 75–80 percent, 15–20 percent blue and (depending on the light source) red secondary hues
| Provider | Destination | Cost |
|---|---|---|
| Registered Shipping Default |
Rest of World
21 days
|
first item
per additional item
shipping capped at
|
| FedEx |
Rest of World
10 days
|
first item
per additional item
shipping capped at
|
| Registered Shipping Default |
Australia
14 days
|
first item
per additional item
shipping capped at
|
| Registered Shipping Default |
Chile
21 days
|
first item
per additional item
shipping capped at
|
| Registered Shipping Default |
Czechia
21 days
|
first item
per additional item
shipping capped at
|
| Registered Shipping Default |
Finland
21 days
|
first item
per additional item
shipping capped at
|
| Registered Shipping Default |
France
21 days
|
first item
per additional item
shipping capped at
|
| Registered Shipping Default |
Italy
21 days
|
first item
per additional item
shipping capped at
|
| Registered Shipping Default |
Poland
21 days
|
first item
per additional item
shipping capped at
|
| Registered Shipping Default |
Spain
21 days
|
first item
per additional item
shipping capped at
|
| Registered Shipping Default |
Sweden
21 days
|
first item
per additional item
shipping capped at
|
| Registered Shipping Default |
United Kingdom
21 days
|
first item
per additional item
shipping capped at
|
| Registered Shipping Default |
United States of America
21 days
|
first item
per additional item
shipping capped at
|
| Express Shipping |
Australia
4 days
|
first item
per additional item
shipping capped at
|
| FedEx |
Chile
7 days
|
first item
per additional item
shipping capped at
|
| Express Shipping |
Czechia
14 days
|
first item
per additional item
shipping capped at
|
| Express Shipping |
Finland
14 days
|
first item
per additional item
shipping capped at
|
| FedEx |
Finland
7 days
|
first item
per additional item
shipping capped at
|
| Express Shipping |
France
14 days
|
first item
per additional item
shipping capped at
|
| Express Shipping |
Italy
14 days
|
first item
per additional item
shipping capped at
|
| FedEx |
Italy
7 days
|
first item
per additional item
shipping capped at
|
| Express Shipping |
Poland
14 days
|
first item
per additional item
shipping capped at
|
| FedEx |
Poland
7 days
|
first item
per additional item
shipping capped at
|
| Express Shipping |
Spain
14 days
|
first item
per additional item
shipping capped at
|
| FedEx |
Spain
7 days
|
first item
per additional item
shipping capped at
|
| Express Shipping |
Sweden
14 days
|
first item
per additional item
shipping capped at
|
| FedEx |
Sweden
7 days
|
first item
per additional item
shipping capped at
|
| FedEx |
United Kingdom
7 days
|
first item
per additional item
shipping capped at
|
| FedEx |
United States of America
7 days
|
first item
per additional item
shipping capped at
|
Hi Welcome to the Sedagems store, Run by Paul Sedawie and specializing in Australian sapphires and g....
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PositiveSuper quick delivery and a beautiful stone! :)
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PositiveBeautiful azurite mineral specimen
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PositiveVery nice thankyou
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Positive
Looks good
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Positive
Looks good
This coupon only applies to Buy It Now purchases