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86.1 CTS A GRADE RAINBOW OBSIDIUM SLAB [F5724 ]
- SKU
- Dimensioni (mm)
- 39 x 37 x 7mm
- Peso (cts)
- 86.1
- Type
- Rough
- Colori
-
QUALITY ROUGH
A GRADE OBSIDIUM SLAB
This is a piece we cut off a rough specimen at app 45 degree angle to expose the amazing patterns.Great cutting experience.We have taken the photo with the rough wet.
| General | |
|---|---|
| Category | Volcanic glass |
| Formula (repeating unit) | 70–75% SiO2, plus MgO, Fe3O4 |
| Identification | |
| Color | Deep black or blackish green |
| Fracture | Conchoidal |
| Mohs scale hardness | 5–6[1] |
| Luster | Vitreous |
| Specific gravity | ~2.4[2] |
| Optical properties | Translucent |
| References | [3] |
Obsidian is a naturally occurring volcanic glass formed as an extrusive igneous rock.
It is produced when felsic lava extruded from a volcano cools rapidly with minimum crystal growth. Obsidian is commonly found within the margins of rhyolitic lava flows known as obsidian flows, where the chemical composition (high silica content) induces a high viscosity and polymerization degree of the lava. The inhibition of atomic diffusion through this highly viscous and polymerized lava explains the lack of crystal growth. Obsidian is hard and brittle; it therefore fractures with very sharp edges, which were used in the past in cutting and piercing tools, and has been used experimentally as surgical scalpel blades. It may contain patterns of gas bubbles remaining from the lava flow, aligned along layers created as the molten rock was flowing before being cooled. These bubbles can produce interesting effects such as a golden sheen (sheen obsidian). An iridescent, rainbow-like sheen (rainbow obsidian) is caused by inclusions of magnetite nanoparticles
| Fornitore di spedizioni | Spedizione a Australia | Spedizione nel resto del mondo | Spedizione combinata ( Australia ) | Spedizione combinata (resto del mondo) |
|---|---|---|---|---|
| FedEx |
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| Registered Shipping |
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- SKU
- Dimensioni (mm)
- 39 x 37 x 7 mm
- Peso (cts)
- 86.1
- Type
- Rough
- Colori
-
QUALITY ROUGH
A GRADE OBSIDIUM SLAB
This is a piece we cut off a rough specimen at app 45 degree angle to expose the amazing patterns.Great cutting experience.We have taken the photo with the rough wet.
| General | |
|---|---|
| Category | Volcanic glass |
| Formula (repeating unit) | 70–75% SiO2, plus MgO, Fe3O4 |
| Identification | |
| Color | Deep black or blackish green |
| Fracture | Conchoidal |
| Mohs scale hardness | 5–6[1] |
| Luster | Vitreous |
| Specific gravity | ~2.4[2] |
| Optical properties | Translucent |
| References | [3] |
Obsidian is a naturally occurring volcanic glass formed as an extrusive igneous rock.
It is produced when felsic lava extruded from a volcano cools rapidly with minimum crystal growth. Obsidian is commonly found within the margins of rhyolitic lava flows known as obsidian flows, where the chemical composition (high silica content) induces a high viscosity and polymerization degree of the lava. The inhibition of atomic diffusion through this highly viscous and polymerized lava explains the lack of crystal growth. Obsidian is hard and brittle; it therefore fractures with very sharp edges, which were used in the past in cutting and piercing tools, and has been used experimentally as surgical scalpel blades. It may contain patterns of gas bubbles remaining from the lava flow, aligned along layers created as the molten rock was flowing before being cooled. These bubbles can produce interesting effects such as a golden sheen (sheen obsidian). An iridescent, rainbow-like sheen (rainbow obsidian) is caused by inclusions of magnetite nanoparticles
| Fornitore di spedizioni | Spedizione a Australia | Spedizione nel resto del mondo | Spedizione combinata ( Australia ) | Spedizione combinata (resto del mondo) |
|---|---|---|---|---|
| FedEx |
|
|
|
|
| Registered Shipping |
|
|
|
|
![86.1 CTS A GRADE RAINBOW OBSIDIUM SLAB [F5724 ]](https://liveplatforms-production.b-cdn.net/tenants/gr/uploads/stores/ipha4mneys1w7gnr.png)
Hi Welcome to the Sedagems store, Run by Paul Sedawie and specializing in Australian sapphires and g....
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PositivoPaid and shipped - no feedback left after 100 days
![86.1 CTS A GRADE RAINBOW OBSIDIUM SLAB [F5724 ]](https://liveplatforms-production.b-cdn.net/tenants/gr/uploads/images/490000-494999/492544/553711a3b037a.JPG?width=480&aspect_ratio=1001%3A1000)
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Positivo
Nice ruby-sapphire stones, good pictures.
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Positivo
Everything was Awesome! Thank you so much for everything! It's always an absolute pleasure buying from you, and will be doing it again soon. Take care and all the best for the new year!
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Positivo
The Pendant is fantastic!
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Positivo
Absolutely smashing books, the opals are magnificent! Thank you so much for everything, will be buying from you again soon. Thank you, again!
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Positivo
The Pendant is breathtaking! Thanks!
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Quando c'è un'icona che indica "Offerta automatica", significa che il nostro sistema sta attivamente piazzando offerte per l'offerente in base alla sua offerta massima. Questo potrebbe sembrare come se gli offerenti stessero superando se stessi, ma è semplicemente il risultato del sistema che aggiorna l'offerta per riflettere il limite massimo degli offerenti.
