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4280.00 CTS POLISHED OPAL SPECIMEN FROM LIGHTNING RIDGE [LRO919]
- SKU
- Dimensiones (mm)
- 146.000 x 105.000 x 46.700mm
- Peso (cts)
- 4280.000
- Body Tone
- N3
- Tipo
- Specimen
- Colores
-
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
- Dimensiones (mm)
- 146.000 x 105.000 x 46.700 mm
- Peso (cts)
- 4280.000
- Body Tone
- N3
- Tipo
- Specimen
- Colores
-
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.
Proveedor de envío | Envío a: país | Envíos al resto del mundo |
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FedEx | $12.00 / :días días | $39.00 / :días días |
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Resto del mundo
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Registered Shipping | $9.00 / :días días | $16.00 / :días días |
:país
:proveedor tiene un descuento de $9.00 en pedidos con 2 o más artículos
Resto del mundo
:proveedor tiene un descuento de $16.00 en pedidos con 2 o más artículos
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Positivo
Good seller.
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Positivo
The stone was more beautiful in person than in the photos. It arrived very quickly. I would definitely recommend this seller and would buy from him again.
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Positivo
Always a pleasure to deal with you! Thanks for fast shipping :)
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Positivo
Lovely stuff! Thanks!
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Positivo
Absolutely stunning multi-colored fire skitters across the surface as if the stone were alive. One of the most beautiful pieces of boulder opal I've ever purchased. Extremely pleased! Thanks!!!
Auditoría
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Comments
The Verified Seller has provided accurate and complete information for this Opal including weight, dimensions and if any treatment