🗊THE DIAMONDS

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Слайд 1


THE DIAMONDS
Описание слайда:
THE DIAMONDS

Слайд 2


Contents: Diamond History Identification Formation Where and how to extract diamonds? The well-known diamonds
Описание слайда:
Contents: Diamond History Identification Formation Where and how to extract diamonds? The well-known diamonds

Слайд 3


Diamond - the firmest substance on the Earth. - is the crystal updating of pure carbon.
Описание слайда:
Diamond - the firmest substance on the Earth. - is the crystal updating of pure carbon.

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History: The name diamond is derived from the ancient Greek αδάμας (adámas), "proper", "unalterable", "unbreakable, untamed". Diamonds are thought to have been first recognized and mined in India, where significant alluvial deposits of the stone could be found many centuries ago along the rivers Penner, Krishna, and Godavari.
Описание слайда:
History: The name diamond is derived from the ancient Greek αδάμας (adámas), "proper", "unalterable", "unbreakable, untamed". Diamonds are thought to have been first recognized and mined in India, where significant alluvial deposits of the stone could be found many centuries ago along the rivers Penner, Krishna, and Godavari.

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Identification: Molar mass - 12.01 g·mol-1 Color - Typically yellow, brown or gray to colorless. Less often blue, green, black, translucent white, pink, violet, orange, purple and red. Crystal habit - Octahedral Crystal system - Isometric-Hexoctahedral Fracture - Conchoidal (shell-like) Mohs scale – hardness 10 Streak – Colorless Specific gravity - 3.52±0.01 Density - 3.5–3.53 g/cm3 Optical properties - Isotropic Dispersion - 0.044
Описание слайда:
Identification: Molar mass - 12.01 g·mol-1 Color - Typically yellow, brown or gray to colorless. Less often blue, green, black, translucent white, pink, violet, orange, purple and red. Crystal habit - Octahedral Crystal system - Isometric-Hexoctahedral Fracture - Conchoidal (shell-like) Mohs scale – hardness 10 Streak – Colorless Specific gravity - 3.52±0.01 Density - 3.5–3.53 g/cm3 Optical properties - Isotropic Dispersion - 0.044

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Formation The conditions for diamond formation to happen in the lithospheric mantle occur at considerable depth corresponding to the requirements of temperature and pressure. These depths are estimated between 140 and 190 km though occasionally diamonds have crystallized at depths about 300 km as well. Also diamonds formed in diamantiferous kimberlites and volcanic pipe.
Описание слайда:
Formation The conditions for diamond formation to happen in the lithospheric mantle occur at considerable depth corresponding to the requirements of temperature and pressure. These depths are estimated between 140 and 190 km though occasionally diamonds have crystallized at depths about 300 km as well. Also diamonds formed in diamantiferous kimberlites and volcanic pipe.

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Schematic diagram of a volcanic pipe
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Schematic diagram of a volcanic pipe

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Where and how to extract diamonds? Ordinary diamonds are and extracted worldwide in the special volcanic breed, named a kimberlite. Now diamonds are extract from two types of deposits: radical (kimberlites and lamproite pipes) and secondary – scatterings. The main center of extraction there were South African countries and minor - Brazil.
Описание слайда:
Where and how to extract diamonds? Ordinary diamonds are and extracted worldwide in the special volcanic breed, named a kimberlite. Now diamonds are extract from two types of deposits: radical (kimberlites and lamproite pipes) and secondary – scatterings. The main center of extraction there were South African countries and minor - Brazil.

Слайд 9


Diamantiferous kimberlites pipe: Yakutia
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Diamantiferous kimberlites pipe: Yakutia

Слайд 10


Diamond in a kimberlite pipe:
Описание слайда:
Diamond in a kimberlite pipe:

Слайд 11


The well-known diamonds:
Описание слайда:
The well-known diamonds:

Слайд 12


Now you know: About a mineral Diamond Its History Identification Formation Where and how to extract diamonds? The well-known diamonds
Описание слайда:
Now you know: About a mineral Diamond Its History Identification Formation Where and how to extract diamonds? The well-known diamonds

Слайд 13


Thanks for your attention! Thanks for your attention!
Описание слайда:
Thanks for your attention! Thanks for your attention!

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