112.7 CTS A GRADE RAINBOW OBSIDIUM SLAB [F5715 ]
- SKU
- 寸法(mm)
- 50.000 x 37.000 x 9.000mm
- 重さ (CT)
- 112.700
- タイプ
- Rough
- 色
-
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
- SKU
- 寸法(mm)
- 50.000 x 37.000 x 9.000 mm
- 重さ (CT)
- 112.700
- タイプ
- Rough
- 色
-
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
配送業者 | 発送先:国 | その他の国への配送 |
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FedEx | $12.00 / :日日 | $39.00 / :日日 |
:国
:数量以上のアイテムを含む注文では、:プロバイダーは $12.00 に割引されます
世界のその他の地域
:数量以上のアイテムを含む注文では、:プロバイダーは $39.00 に割引されます
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Registered Shipping | $9.00 / :日日 | $16.00 / :日日 |
:国
:数量以上のアイテムを含む注文では、:プロバイダーは $9.00 に割引されます
世界のその他の地域
:数量以上のアイテムを含む注文では、:プロバイダーは $16.00 に割引されます
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ポジティブ
AAAA+++ Very Happy! Just like the pic.
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ポジティブ
AAAA+++ Very Happy! Just like the pic.
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ポジティブ
Beautiful
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ポジティブ
Very nice stone