Market Value of The Non Diamond Gemstone

Theres a good article about “Understanding the liquidation market value of the non-diamond gemstones”  here, written by David Atlas, a president of D. Atlas & Co.,Inc., partner in Diamond & Gem Laboratories of America and consultant to Imagem, Inc. who also as Expert witness, consumer consultant, lecturer and appraiser.

The conclusion I get from this article is …

Berlian Dan Pemakaiannya Bagi Manusia

Teknologi Zaman Keemasan

Pemakaian Permata Dapat Bermanfaat Bagi Manusia

Oleh Saudari-inisiat Chio, San Jose, California, Amerika Serikat
(Asal dalam Bahasa Inggris)

Catatan paling awal tentang berlian ditemukan dalam Arthasastra, sebuah risalah kuno India berbahasa Sansekerta tentang perekonomian yang ditulis sekitar abad ke-4 SM. Pada abad ke-6, berlian telah dikenal sebagai batu mulia yang bisa menggores batu mulia mana pun dan bahkan bisa menggores batu delima. Berlian dapat menggores apa pun, tetapi tidak bisa digores oleh apa pun. Setelah abad ke-18, dengan meningkatnya permintaan, pencarian berlian meluas hingga ke Brasil, Afrika Selatan, Kanada, dan Australia.

Para ilmuwan modern mengakui bahwa berlian merupakan salah satu bahan yang paling keras di bumi ini dan juga paling lamban terhadap reaksi kimia (tidak reaktif). Berlian juga sangat awet dan memiliki koefisien gesek yang rendah (benda lain dapat melewatinya dengan mudah). Berlian juga stabil pada suhu dan tekanan yang tinggi sekali. Sejumlah besar gelombang cahaya dapat menembusnya, mulai dari ultraviolet hingga inframerah dalam spektrum elektromagnetik.

Natural Champagne Colored Diamonds in Jewelry

http://www.champagnediamondcenter.com/about_champagne.asp

Beautiful, naturally
Champagne diamonds are the most exotic, fashionable and alluring of natural colored diamonds. With soft, radiant tones, and exquisite shades from light champagne to deep, rich cognac and brown, champagne diamonds radiate natural warmth, sophistication and beauty that make them the perfect accompaniment to one’s personal style.

The perfect gem for all occasions

Boron is Harder Than Diamond

by : Philip Ball

You don’t often break a diamond. So when in 2003 Dave Mao cracked a tooth of his diamond anvil, he knew something extraordinary must have happened. Together with his daughter Wendy and other colleagues at the Geophysical Laboratory of the Carnegie Institution for Science in Washington DC, he was using the device to test materials at pressures many millions of times higher than those at the Earth’s surface – higher even than in our planet’s core – by squeezing them between two tiny diamond jaws.

Behind the glitz, diamond is just a form of carbon. It is, however, by common consent the hardest material known. The substance in the Maos’ test cell had also begun as pure carbon. It was plain old graphite – the soft, slippery stuff that is used for pencil leads and lubricants. Clearly, something had happened in the anvil cell to make it awesomely hard.

Other Diamonds Color

Virtually every color, shade and hue the mind can imagine, nature has created within a marvelous natural color diamond…most now available for our pleasure, some still lying silently awaiting discovery. The range of color varieties is almost inexhaustible but NCDIA is committed to present, on a continuing basis, the full range of color categories expressed by these wonderful natural creations. Be sure to revisit us here on a regular basis to see new additions as they are revealed.

Green Diamond

Pure green diamonds are very rare since their natural green color comes from exposure to irradiated particles over eons of time. With perhaps only one new green being introduced to the market each year pure green stones are more highly valued than the yellowish green or green-yellows.

Colour of Diamond

Colors in diamond originate from lattice defects and impurities. (See wikipedia.org for further explanation about this). Only atoms of nitrogen, boron and hydrogen can be introduced into diamond.

Nitrogen is responsible for the yellow and brown \ orange shades in diamonds.

Boron is responsible for the gray blue colors. ranging from deep blue to sky blue.

Natural radiation over millions of years that causes the color in green diamond.

Extreme  pressure  deep in the earth can abnormally compress diamond’s  structure and creating a very rare of brown, purple, pink, or red diamonds. Evidence of it  can be seen in many Argyle pink and congac diamonds.

notegolddiamond archives

What Gives A Diamond Colour

Whats gives a diamond color

Colors in diamond originate from lattice defects and impurities. (See wikipedia.org for further explanation about this). Only atoms of nitrogen, boron and hydrogen can be introduced into diamond. Nitrogen is responsible for the yellow and brown in diamonds. Boron is responsible for the gray blue colors. If an element interacts with carbon atoms during diamond creation, the diamond’s color can change. Radiation and pressure on a diamond’s structure will also impact its color as well. So, beside natural form of color, diamond has two additional sources of color : irradiation (usually by alpha particles), that causes the color in green diamonds; and physical deformation of the diamond crystal known as plastic deformation. Plastic deformation is the cause of color in some brown and perhaps pink and red diamonds. In order of rarity, colorless diamond, by far the most common, is followed by yellow and brown, by far the most common colors, then by blue, green, black, translucent white, pink, violet, orange, purple, and the rarest, red.

The physical conditions necessary to color a diamond naturally occur very scarcely. For every natural color diamond, there are 10,000 colorless ones that have made the trip to the Earth’s surface.

What Variables Give Diamonds Their Color ?

	The presence of nitrogen can impart yellow or orange shades to a diamond.

The presence of boron will impart a blue shade to a diamond ranging from deep blue to sky blue.

The presence of hydrogen produces unique violet hues.

Tremendous pressure exerted on a diamond deep in the earth can abnormally compress its structure, thus creating a red, pink, purple or brown stone. Evidence of graining, which scientists believe is attributed to tremendous pressures under the earth can be seen at 10x in many Argyle pink and congac diamonds.

Natural radiation impacting already formed diamonds over millions of years can give them a green hue.

Grading Natural Color Diamonds

While evaluated Natural Color Diamonds, the gemologist directly look from the “face up” position, through the top of the diamond. There are three parameter that used by gemologist  the Gemological Institute of America (GIA) and the International Gemological Institute (IGI) to describe color of the fancy diamonds :

First : The basic hue colors of the fancy diamonds.It refers to the dominant color of the diamonds, such as brown, green, blue, pink, etc. Also, There can be tints (modifiers), which will causing more than one hue to the stone. For instance, a purplish-pink diamond indicates a stone with principal pink hue and purplish tints.  Pure color which is contain no tints will be called pure primary tints.

Second, their intensity. Both color characteristics form the basis for determining a fancy colored diamond’s worth. Usually, the more intense the color, the rarer and more expensive the diamond will be

Color Saturation

Color Saturation describes the strength or intensity of the hue or main color. The saturation of light toned diamonds can vary from a pastel to vivid and intense. Darker diamonds will range from dark to deep in description.

Color Tone

Color Tone refers to how much lightness or darkness a stone appears to retain even when illuminated. The range, obviously, is from light or very light, to dark or very dark.

When grading fancy diamonds, the GIA uses nine grade categories:

1.Faint

2.Very Light

3.Light

4.Fancy Light

5.Fancy

6.Fancy Dark

7.Fancy Intense

8.Fancy Deep

9.Fancy Vivid

It’s interesting to note, that a secondary undertone that enhances the color of a diamond is considered a plus, while a secondary undertone that detracts from the color is a negative.

How Color Is Graded

Natural Color Diamonds are graded by gemological laboratories in very high-tech environments under controlled lighting environments similar to natural daylight. First, diamonds are tested for treatment, synthetic additions or alterations to ensure authenticity. Most laboratories will scan diamonds with a spectroscope to compare readings with their historical data and utilize High-Pressure-High-Temperature (HPHT, the most common process used to enhance the color of diamonds) detection and other proprietary equipment. Gemologists will also use comparison stones and proprietary color chips to compare two diamonds to each other. Though the face-up appearance is ultimately what determines the diamond color, stones are evaluated from other angles as well.

Grading Reports
Two types of reports are available:
(1) Full Certificates provide full details about a stone including clarity, symmetry and polish, and (2) Color-only certificates that provide color grading for natural fancy colored diamonds.

“Grading the color of the colored diamond is one of the greatest challenges in gemology… the challenge has been to apply scientific, yet practical, time-tested standards to such rarities of nature…” G&G (Gems & Gemmology), Color Grading of Colored Diamonds in the GIA Gem Trade Laboratory

Fancy Color Diamonds

“Fancy color diamonds” are a very rare and expensive type of diamond. A fancy diamond can range in color, from various shades of yellow to red, pink, blue, or green. Fancy Diamonds are valuable because of their rarity, and are the only diamonds that are made more valuable because their color exceeds the GIA color scale.

Fancy color diamonds are graded based on two factors. The first is their basic hue, such as pink, yellow, blue, green, etc. The second is their intensity. Both color characteristics form the basis for determining a fancy colored diamond’s worth. Usually, the more intense the color, the rarer and more expensive the diamond will be.

When grading fancy diamonds, the GIA uses nine grade categories:

1.Faint

2.Very Light

3.Light

4.Fancy Light

5.Fancy

6.Fancy Dark

7.Fancy Intense

8.Fancy Deep

9.Fancy Vivid

It’s interesting to note, that a secondary undertone that enhances the color of a diamond is considered a plus, while a secondary undertone that detracts from the color is a negative.

Fancy Color Diamonds were found throughout the years in Australia, Brazil, Venezuela and parts of Africa where conditions are right for the development of their natural color.

Berlian Cokelat

Berlian coklat adalah berlian klasik. Warna cokelat keemasan yang dimilikinya membuat berlian menjadi lebih lembut, dan warnanya yang netral membuatnya menjadi pilihan yang sempurna untuk keabadian sebuah perhiasan.

Origin
Warna warna berlian cokelat dari Brown champagne ke brown cognac banyak ditemukan di Australia, Afrika dan Siberia. The Argyle Diamond Mine di Barat Australia adalah produser terbesar berlian cokelat ini. Di Argyle, berlian cokelat ditambang dengan penuh perhatian.

Royal factor
potongan berlian cokelat alami terbesar adalah berlian cokelat gelap the Golden Jubilee, yang memiliki kebesaran nama dan misteri tersendiri. The Golden Jubilee, 545 karat, adalah berlian yang ditawarkan kepada Raja Thailand untuk merayakan peringatan 50 tahun kenaikan-Nya ke takhta. Waktu untuk memoles batu itu demi perayaan tersebut selama tidak kurang dari tiga tahun.

On The Red Carpet
Maria Menounos pada Oscar 2004 mengenakan baju 3000 carat champagne diamond miliknya.
Pada Academy Awards, aktris Cameron Diaz mengenakan baju berlian prada 20 carat cognac-colored diamond,
Aktris Jennifer Love-Hewitt memamerkan cincin berlian cokelat 7 karat. Maria Menounos, reporter dari E! and Entertainment Tonight’s mempesona pengunjung oscar 2004 dengan menjadi “the most talkedabout celebrity” dengan baju berlian champagne sensasionalnya
yang dirancang oleh desiner adibusana Randi Rahm, embroidered with 2,000 brown diamonds totaling 3,000 carats and worth a staggering $2.5 million! As if that weren’t enough glam for the night, Menounos added a splendid 6 carat cognac diamond pendant. Mari Natsuki, Japan’s favorite movie star, swears by her brown rocks. Chic, sophisticated, understated and above all, unique, brown diamonds are the latest must-haves.

Pastels
Cinnamon (pinkish-orangish brown)
Champagne (yellowish brown)
Chocolate (pure brown)

Dark and Deep
Cognac (greenish-orangish-yellowish brown)
Honey (yellowish-orangish brown)
Clove (olive brown)

Brown Diamond

Brown diamonds are the new classic. Their golden tones make them a softer, gentler alternative to the colorless diamond, and their neutral color makes them the perfect choice for timeless jewelry with a contemporary, trendy feel.

Origin
Brown diamonds in shades from champagne to cognac are found in Australia, Africa and Siberia. The Argyle Diamond Mine in Western Australia is the world’s largest producer of these stones. At Argyle, brown diamonds are mined with anticipation and excitement. From the subtly elegant champagnes to the smooth, rich cognacs, brown diamonds are the new classic.

Royal factor
The world’s largest cut natural diamond is a dark rich champagne stone, the Golden Jubilee, which possesses a magnificence and mystery of its own. The Golden Jubilee, 545 carats, was offered to the King of Thailand to celebrate the 50th anniversary of his ascension to the throne. Polishing the stone took no less than three years.

On The Red Carpet
Maria Menounos at the 2004 Oscars wearing her 3000 carat champagne diamond dress
At the Academy Awards, actress Cameron Diaz wore a 20 carat cognac-colored diamond with a Prada dress, while actress Jennifer Love-Hewitt flaunted a 7 carat brown diamond ring. Maria Menounos, E! reporter and Entertainment Tonight’s dazzling host for the 2004 Oscars became the most talkedabout celebrity with her sensational champagne diamond dress, created by haute designer Randi Rahm, embroidered with 2,000 brown diamonds totaling 3,000 carats and worth a staggering $2.5 million! As if that weren’t enough glam for the night, Menounos added a splendid 6 carat cognac diamond pendant. Mari Natsuki, Japan’s favorite movie star, swears by her brown rocks. Chic, sophisticated, understated and above all, unique, brown diamonds are the latest must-haves.

Pastels
Cinnamon (pinkish-orangish brown)
Champagne (yellowish brown)
Chocolate (pure brown)

Dark and Deep
Cognac (greenish-orangish-yellowish brown)
Honey (yellowish-orangish brown)
Clove (olive brown)