Diamond is the allotrope of carbon where the carbon atoms are arranged
in an isometric-hexoctahedral crystal lattice.
hardness and high dispersion of light make it useful for industrial
applications and jewelry.
the hardest known naturally-occurring mineral.
possible to treat regular diamonds under a combination of high pressure
and high temperature to produce diamonds (known as Type-II diamonds)
that are harder than the diamonds used in hardness gauges.
Alluvial diamonds is the term used to describe diamonds that have been
removed from the primary source (Kimberlite) by natural erosive action
over millions of years, and eventually deposited in a new environment
such as a river bed, an ocean floor or a shoreline.
Diamonds and other precious and semi-precious gemstones are extracted
from the earth via three main types on mining. These diamond extraction
methods vary depending on how the minerals are deposited within the
earth, the stability of the material surrounding the desired mineral,
and the peripheral damage done to the surrounding enviroment.
principle methods of extraction for diamonds are Artisanal Mining , Hard
Rock Mining ,Marine Mining, Open Pit Mining, Placer Mining.
Diamond Mining, also known as "sand bank mining" is used for extracting
diamonds and minerals from alluvial, eluvial, and or colluvial secondary
Open-Pit diamond mining or "Open-Cast Mining" is a method of extracting
rock or minerals from the earth by removal from an open pit or burrow.
Open pit mines are used when deposits of minerals are found near the
surface or along kimberlite pipes.
term "Hard Rock Diamond Mining" refers to various techniques used to
mine gems, minerals, and ore bodies by tunneling underground and
creating underground "rooms" or "stopes" supported by timber pillars of
Poly-crystalline diamond (poly-C) is expected to be an excellent
packaging material for biomedical and environmental MEMS devices. A
poly-C thin film packaging technology has been developed to explore the
application of this novel material on post-MEMS encapsulation packaging
original route to process diamond wires, denominated In Situ Technology,
whose fabrication involves mechanical conformation processes, such as
rotary forging, copper tubes restacking, and thermal treatments, such as
sintering and recrystallisation of a bronze 4 wt.% diamond composite.
Microstructure-mechanical-electronic transport property relationships of
a new multifunctional material designated as ultrananocrystalline
diamond (UNCD), and to utilize this material in microelectromechanical
systems (MEMS) and nanoelectromechanical systems (NEMS).
mining of diamonds plays a critical role in the economies of Southern
Africa, Russia and, to a lesser degree, in Australia and Canada.
has a special place in the world diamond industry as a major rough
producer (second largest in terms of value) with a significant cutting
and polishing industry, skilled labour and favourable conditions for
manufacturing a wide range of high-quality polished diamonds.
China’s diamond jewellery market today is worth over $1.75 billion USD
at the retail level.
today is in keeping pace with supplying the demand for high quality
diamonds due to the exceptional diamond consumer trends that have been
developing in China throughout the past decade or so.
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