Diamond

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This Document is about Diamonds

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The Rocks
Relatively hard, naturally formed mineral or petrified matter; stone.
Rocks
are the pages in the history book of the earth. They tell stories of times long past.
From rocks, we have learned of dinosaurs, trilobites and thousands of other life
forms that existed on earth once but are now no more.
Examples of rocks:
The Gemstone Aquamarine

and

The Diamond

Both rocks are Igneous, are the most popular rocks on the world, and are
extensively used in jewelry.Also, it forms in beautiful crystals that can be
quite large and totally transparent and both are non-metallic;
The only differences in transparency is that the thegemstone aquamarine is
transparent to translucent and the diamond is transparent to opaque.
Other differences between those two rocks are that the luster of diamond is
Adamantine,rough stones have a greasy luster and the luster of Gemstone Aquamarine
is Vitreous. The color of diamond is usually light blue, sometimes white,
yellow, orange, and the gemstone aquamarine ranges in color from a faint
light blue to blue and bluish-green, with lighter colored stones being the more
common type.
If we speak about hardness ,we can say that the Diamond is the hardest
naturally occurring substance known but the hardness of aquamarine is about
7.5 - 8.0. Other characteristics: Aquamarine, named for the Latin phrase
"water of the sea", is the blue to blue-green variety Beryl. Beryl also contains
other gem varieties, including Emerald, and some lesser known varieties such
as Morganite and Heliodor. Diamonds has many unequaled qualities and is
very unique among minerals, it is the greatest conductor of heat, it has the
highest melting point of any substance, It also has the most dense atomical
configuration of any mineral Because of heat conduction, Diamonds are cold
to the feel at or below room temperature.

Amazon River, the greatest river of South America and the largest drainage
system in the world in terms of the volume of its flow and the area of its
basin. The total length of the river—as measured from the headwaters of the
Ucayali-Apurímac river system in southern Peru—is at least 4,000 miles
(6,400 km), which makes it slightly shorter than the Nile River but still the
equivalent of the distance from New York City to Rome. Its westernmost
source is high in the Andes Mountains, within 100 miles (160 km) of the
Pacific Ocean, and its mouth is in the Atlantic Ocean, on the northeastern
coast of Brazil. However, both the length of the Amazon and its ultimate
source have been subjects of debate since the mid-20th century, and there
are those who claim that the Amazon is actually longer than the Nile.

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