Green Diamond Wedding Party Jewelry 88

Green Diamond Wedding Party Jewelry.

By Farzana Aamir. 

Through studies of carbon isotope ratios (similar to the methodology used in carbon dating, except with the stable isotopes C-12 and C-13), it has been shown that the carbon found in diamonds comes from both inorganic and organic sources. Some diamonds, known as harzburgitic, are formed from inorganic carbon originally found deep in the Earth's mantle. In contrast, eclogitic diamonds contain organic carbon from organic detritus that has been pushed down from the surface of the Earth's crust through subduction (see plate tectonics) before transforming into 

diamond. These two different source of carbon have measurably different 13C:12C ratios. Diamonds that have come to the Earth's surface are generally quite old, ranging from under 1 billion to 3.3 billion years old. This is 22% to 73% of the age of the Earth

Green Diamond Women Fashion Jewelry 87

Green Diamond Women Fashion Jewelry.

By Farzana Aamir.

The conditions for diamond formation to happen in the litho spheric mantle occur at considerable depth corresponding to the requirements of temperature and pressure. These depths are estimated between 140 and 190 kilometers (87 and 118 mi) though occasionally diamonds have crystallized at depths about 300 kilometers (190 mi).[11] The rate at which temperature changes with increasing depth into the Earth varies greatly in different parts of the Earth. In particular, under oceanic plates the temperature rises more quickly with depth, beyond the range required for diamond formation at the depth required. The correct combination of temperature and pressure is only found in the thick, ancient, and stable parts of continental plates where regions of litho sphere 

known as cratons exist. Long residence in the cratonic litho sphere allows diamond crystals to grow larger

Green Diamond Girls Fashion Jewelry 86

Green Diamond Girls Fashion Jewelry.

By Farzana Aamir. 

The formation of natural diamond requires very specific conditions—exposure of carbon-bearing materials to high pressure, ranging approximately between 45 and 60 kilobars (4.5 and 6 GPa), but at a comparatively low temperature range between approximately 900 and 1,300 °C (1,650 and 2,370 °F). These conditions are met in two places on Earth; in the lithospheric mantle below relatively stable continental plates, and at the site of a meteorite strike. The formation of natural diamond requires very specific conditions—exposure of carbon-bearing materials to high pressure, 

ranging approximately between 45 and 60 kilobars (4.5 and 6 GPa), but at a comparatively low temperature range between approximately 900 and 1,300 °C (1,650 and 2,370 °F). These conditions are met in two places on Earth; in the lithospheric mantle below relatively stable continental plates, and at the site of a meteorite strike.

Green Diamond Fashion By Women Jewelry 85

Green Diamond Fashion By Women Jewelry.
By Farzana Aamir.

In 1772, Antoine Lavoisier used a lens to concentrate the rays of the sun on a diamond in an atmosphere of oxygen, and showed that the only product of the combustion was carbon dioxide, proving that diamond is composed of carbon. Later in 1797, Smithson Tennant repeated and expanded that experiment. By demonstrating that burning diamond and graphite releases the same amount of gas he established the chemical equivalence of these substances.[8]

The most familiar use of diamonds today is as gemstones used for adornment, a use which dates back into antiquity. The dispersion of white light into spectral colors is the primary gemological characteristic of gem diamonds. In the 20th century, experts in gemology have developed methods of grading diamonds and other gemstones based on the characteristics most important to their value as a gem. Four 
characteristics, known informally as the four Cs, are now commonly used as the basic descriptors of diamonds: these are carat, cut, color, and clarity.[9] A large, flawless diamond is known as a paragon.

Green Diamond Party Style Fashion Jewelry 84

Green Diamond Party Style Fashion Jewelry.

By Farzana Aamir.

See also: Diamond (gem stone)

The name diamond is derived from the ancient Greek αδάμας (adámas), "proper", "unalterable", "unbreakable", "untamed", from ἀ- (a-), "un-" + δαμάω (damáō), "I overpower", "I tame".[3] 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. Diamonds have been known in India for at least 3,000 years but most likely 6,000 years.[4]

Diamonds have been treasured as gemstones since their use as 

religious icons in ancient India. Their usage in engraving tools also dates to early human history.[5][6] The popularity of diamonds has risen since the 19th century because of increased supply, improved cutting and polishing techniques, growth in the world economy, and innovative and successful advertising campaigns.[7]

Green Diamond Stylish Fashion Jewelry 83

Green Diamond Stylish Fashion Jewelry.

By Farzana Aamir. 

Most natural diamonds are formed at high temperature and pressure at depths of 140 to 190 kilometers (87 to 118 mi) in the Earth's mantle. Carbon-containing minerals provide the carbon source, and the growth occurs over periods from 1 billion to 3.3 billion years (25% to 75% of the age of the Earth). Diamonds are brought close to the Earth′s surface through deep volcanic eruptions by a magma, which cools into igneous rocks known as kimberlites and lamproites. Diamonds can also be produced synthetically in a high-pressure high-temperature process which approximately simulates the conditions in the Earth's mantle. An alternative, and completely different growth technique is chemical vapor deposition (CVD). Several non-diamond materials, which include cubic zirconia and silicon carbide and are often called 

diamond simulants, resemble diamond in appearance and many properties. Special gem o logical techniques have been developed to distinguish natural and synthetic diamonds and diamond simulants.Most natural diamonds are formed at high temperature and pressure at depths of 140 to 190 kilometers (87 to 118 mi) in the Earth's mantle. Carbon-containing minerals provide the carbon source, and the growth occurs over periods from 1 billion to 3.3 billion years (25% to 75% of the age of the Earth). Diamonds are brought close to the Earth′s surface through deep volcanic eruptions by a magma, which cools into igneous rocks known as kimberlites and lamproites. Diamonds can also be produced synthetically in a high-pressure high-

Green Diamond Weddings Rings 82

Green Diamond Weddings Rings.

By Farzana Aamir. 

Because of its extremely rigid lattice, it can be contaminated by very few types of impurities, such as boron and nitrogen. Small amounts of defects or impurities (about one per million of lattice atoms) color diamond blue (boron), yellow (nitrogen), brown (lattice defects), green (radiation exposure), purple, pink, orange or red. Diamond also has relatively high optical dispersion (ability to disperse light of different colors). Because of its extremely rigid lattice, it can be contaminated by very few types of impurities, such as boron and nitrogen. Small amounts of defects or impurities (about one per million of lattice atoms) color diamond blue (boron), yellow (nitrogen), brown (lattice defects), green (radiation exposure), purple, pink, orange or red. Diamond also has relatively high optical dispersion (ability to disperse light of different colors).

Green Diamond Engagement Jewelry 81

Green Diamond Engagement Jewelry. 

By Farzana Aamir. 

primary deposit.

General

Category Native Minerals

Formula

(repeating unit) C

Strunz classification 01.CB.10a

Identification

Formula 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 (Cubic)

Cleavage 111 (perfect in four directions)

Fracture Conchoidal (shell-like)

Mohs scale hardness 10

Luster Adamantine

Streak Colorless

Diaphaneity Transparent to subtransparent to translucent

Specific gravity 3.52±0.01

Density 3.5–3.53 g/cm3

Polish luster Adamantine

Optical properties Isotropic

Refractive index 2.418 (at 500 nm)

Birefringence None

Pleochroism None

Dispersion 0.044

Melting point Pressure dependent

References

Green Diamond Girls Fashion Jewelry 80

Green Diamond Girls Fashion Jewelry.

By Farzana Aamir.

In mineralogy, diamond (from the ancient Greek αδάμας – adámas "unbreakable") is a metastable allotrope of carbon, where the carbon atoms are arranged in a variation of the face-centered cubic crystal structure called a diamond lattice. Diamond is less stable than graphite, but the conversion rate from diamond to graphite is negligible at standard conditions. Diamond is renowned as a material with superlative physical qualities, most of which originate from the strong covalent bonding between its atoms. In particular, diamond has the highest hardness and thermal conductivity of any bulk material. Those properties determine the major industrial application of diamond in cutting and polishing tools and the scientific applications in diamond knives and diamond anvil cells.

This article is about the mineral. For the gem stone, see Diamond (gem stone). For other uses, including the shape ◊, see Diamond (disambiguation).

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Diamond

A clear octahedral stone protrudes from a black rock.

The slightly misshapen octahedral shape of this rough diamond crystal in matrix is typical of the mineral. Its lustrous faces also indicate that this crystal is from a 

Green Diamond Wedding Fashion Jewelry 79

Green Diamond Wedding Fashion Jewelry.

By Farzana Aamir. 

The stone's unique apple green color is due to natural exposure to radioactive materials, as the irradiation of diamonds can produce changes in color. The Dresden Green Diamond has been used to compare natural versus lab-produced green diamonds — it is hoped that it can be used to devise a test to differentiate between naturally green diamonds, which are quite rare, and lab-

produced ones The stone's unique apple green color is due to natural exposure to radioactive materials, as the irradiation of diamonds can produce changes in color. The Dresden Green Diamond has been used to compare natural versus lab-produced green diamonds — it is hoped that it can be used to devise a test to differentiate between naturally green diamonds, which are quite rare, and lab-produced ones The stone's unique apple green color is due to natural exposure to radioactive materials, as the irradiation of diamonds can produce changes in color. The Dresden Green Diamond has been used to compare natural versus lab-produced green diamonds — it is hoped that it can be used to devise a test to differentiate between naturally green diamonds, which are quite rare, and lab-produced ones

Green Diamond Party Fashion Jewelry 78

Green Diamond Party Fashion Jewelry.

By Farzana Aamir.

The Dresden Green Diamond has a historical record dating back to 1722, when a London news-sheet carried an article about it in its 25 October-27th edition.[2] It was acquired by Augustus III of Poland from a Dutch merchant in 1742 at the Leipzig Fair.[2] In 1768, the diamond was incorporated into an extremely valuable hat ornament, surrounded by two large and 411 medium-sized and small diamonds.[3] This is the setting that the Dresden Green still appears in today.

In 2000, American jeweler, Harry Winston arranged to display the Dresden Green at the New York flagship store and then at the Smithsonian in Washington DC, USA, where it was displayed in the Harry Winston pavilion next to the largest blue diamond in the world, the Hope Diamond.

Green Diamond Fashion Jewelry 77

Green Diamond Fashion Jewelry.

By Farzana Aamir.

Dresden Green Diamond

From Wikipedia, the free encyclopedia

Dresden Green

Dresden Green. jpg

The diamond in its hat clasp ornament

Weight 41 carats (8.2 g)

Color Natural green

Country of origin India

Date discovered Before 1722

Glass copy of the Dresden Green

The Dresden Green Diamond, also known as "Dresden Green", is a 41 carats (8.2 g) natural green diamond, which probably originated in the Kollur mine in the state of Andhra Pradesh in India.

The Dresden Green is a rare Type IIa, and it is said to be internally flawless.[1]

It is named after Dresden, the capital of Saxony, Germany where it has been on display for most of the last two centuries. Today, the diamond is shown in the "New Green Vault" at Dresden Castle.