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4280.00 CTS POLISHED OPAL SPECIMEN FROM LIGHTNING RIDGE [LRO919]
- SKU
- Dimensioni (mm)
- 146.000 x 105.000 x 46.700mm
- Peso (cts)
- 4280.000
- Body Tone
- N3
- Tipo
- Specimen
- Colori
-
Size and weight are approximate.
The colour area has been well polished.
Read this interesting article on this specimen done by Dr Simon pecover (BA Earth Science, MSc & PhD)* Research Gemmologist and Geoscientist .
What an amazing opal-layered-folded structure is displayed by this specimen.
Lately I have been doing more research on these types of structures in
Australian opal, as they closely resemble "Kelvin-Helmholtz" instability
billows and folds, which can be formed in highly viscous fluids subjected to
shear instability conditions; especially when such conditions are imposed on
density stratified viscous non-Newtonian fluids subjected to seismic shaking
(something that would be expected to have occurred in a
tectonically-generated fault-controlled opal-vein-forming environment).
Such structures are known to form in layered fluids displaying density
gradients, particularly where less dense fluid layers sit on top of denser
fluid layers. When these layers are subjected to shear flow, instability
arises because of the density contrasts; with orientation preserved through
continuous folding, thereby defining the direction of turbulent flow.
Importantly, understanding the shear-strain environment of GAB opal deposit
formation provides important exploration clues as to where opal deposits may
have been concentrated in the host sedimentary rocks of this extraordinarily
unique gem-opal-rich geological basin.
it is a important piece which demonstrates the vigorous shear-dominated
hydrodynamic and rheological environment under which the opal vein deposits
of Lightning Ridge were likely formed.
- SKU
- Dimensioni (mm)
- 146.000 x 105.000 x 46.700 mm
- Peso (cts)
- 4280.000
- Body Tone
- N3
- Tipo
- Specimen
- Colori
-
Size and weight are approximate.
The colour area has been well polished.
Read this interesting article on this specimen done by Dr Simon pecover (BA Earth Science, MSc & PhD)* Research Gemmologist and Geoscientist .
What an amazing opal-layered-folded structure is displayed by this specimen.
Lately I have been doing more research on these types of structures in
Australian opal, as they closely resemble "Kelvin-Helmholtz" instability
billows and folds, which can be formed in highly viscous fluids subjected to
shear instability conditions; especially when such conditions are imposed on
density stratified viscous non-Newtonian fluids subjected to seismic shaking
(something that would be expected to have occurred in a
tectonically-generated fault-controlled opal-vein-forming environment).
Such structures are known to form in layered fluids displaying density
gradients, particularly where less dense fluid layers sit on top of denser
fluid layers. When these layers are subjected to shear flow, instability
arises because of the density contrasts; with orientation preserved through
continuous folding, thereby defining the direction of turbulent flow.
Importantly, understanding the shear-strain environment of GAB opal deposit
formation provides important exploration clues as to where opal deposits may
have been concentrated in the host sedimentary rocks of this extraordinarily
unique gem-opal-rich geological basin.
it is a important piece which demonstrates the vigorous shear-dominated
hydrodynamic and rheological environment under which the opal vein deposits
of Lightning Ridge were likely formed.
Fornitore di spedizioni | Spedizione in :paese | Spedizione nel resto del mondo |
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FedEx | $12.00 / : giorni giorni | $39.00 / : giorni giorni |
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Registered Shipping | $9.00 / : giorni giorni | $16.00 / : giorni giorni |
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Positivo
This stone is perfect, it looks amazing. Thanks a lot, this is awesome. Cheers :-)
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Positivo
Interesting info and great pictures.
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Positivo
Incredible opal. Lighting quick shipping. Second purchase from Seda over the years and I recommend them as a trusted seller. Thank you!
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Positivo
This Opal is so beautiful. It looks much more better in real than in the photos and video. Thanks for the positive experience. Also the communication was great. Thanks for answering all of my questions
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Positivo
Very nice stone. They look beautiful. Thanks. Also the communication was great. Thanks for answering all of my questions
Verifica
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Descrizione Preciso
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Immagini accurate
Comments
The Verified Seller has provided accurate and complete information for this Opal including weight, dimensions and if any treatment