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Diamond Fluorescence
Fluorescence is the emission of bluish light emitted by about one third
of gem-quality diamonds when exposed to long-wave ultraviolet light. The
intensity may vary from faint to very strong. Under normal lighting
conditions, this property of fluorescence is not detectable. However, a
naturally fluorescent diamond tends to emit a soft colored glow when
held under an ultraviolet lamp or “black light". Fluorescence is not
harmful to the diamond or to the wearer. Most commonly diamonds show
bluish light while exhibiting fluorescence, but can also show shades of
yellow or white depending on the inclusions in the diamond crystal
matrix. Fluorescence is described in the range from none (or inert),
faint, negligible, medium, strong and very strong.
Fluorescence in diamonds can have both favorable
and unfavorable effects. For example, diamonds in the color range from I
to N with medium to strong blue fluorescence can appear more colorless,
which is an obvious advantage. The bluish emission masks the very faint
yellowish body color of these diamonds. Diamonds with very strong
fluorescence can exhibit an oily or milky appearance, even under
incandescent lighting. However, according to a GIA study, the average
observer was not able to detect any difference in color or transparency
when viewing diamonds with fluorescence.
Fluorescence of diamonds is often used to detect
fakes. Gemologists identify and separate diamonds from the diamond
look-alikes (such as moissannite and cubic zirconium) by viewing the gem
under a UV lamp. If it emits blue light, it is almost certainly a diamond.
In fact, most diamonds have some degree of fluorescence under natural light
consisting of some UV frequencies. But the reverse cannot be stated true,
that is, if a suspected diamond does not show fluorescence, it cannot be
made certain that it is not a diamond.
For a diamond with color range from D to F,
fluorescence is thought to interfere with the flow of light and make the
diamond appear a little oily or murky. This may not hold true for most
diamonds. But diamonds in the I to N range get a better color grade if
they exhibit fluorescence.
Color Enhancements
Coloring of a diamond is performed by three methods: Irradiation, Thin
Film application and High Temperature and High Pressure (HTHP). The
first two are able to just intensify a diamond color (off colored Cape
series stones). Some irradiation methods produce a thin skin of color,
therefore these methods are applied to already cut and polished
diamonds. But HTHP modifies and removes color and can be performed on
both cut and rough diamonds. Only certain diamonds are treatable by this
method. Irradiation and HTHP methods are almost permanent in effect
unlike thin film method. CIBJO demands disclosure of all color
enhancements performed on a diamond...
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Diamond Clarity Enhancements
Diamond enhancements are performed on natural as
well as synthetic diamonds to improve their gemological characteristics.
Enhancements are usually performed on the diamonds already cut and
polished. Enhancements include clarity treatments to remove inclusions,
such as laser drilling, application of sealants for filling cracks,
color treatments for improving a diamond’s color grade or treatments to
give fancy color to a white or off colored diamond. When selling a
diamond....
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Diamond Ring Settings
Diamond ring settings vary as much as the diamonds and
many innovative and new designs are created everyday to
beat competition. The ring setting type is as important
as a diamond as it would decide the final appearance of
a diamond as a jewel. The variety and quality of ring
settings varies from jeweler to jeweler. If one seeks
the best or wants something different, he/she needs to
search more than one jeweler and also see the available
variety on the online jewelry websites. Wedding and
engagement rings are available in....
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How to Take Care of your Diamonds
Diamond requires periodical cleaning to retain its beauty and luster to
last for a lifetime. Through day to day activities, diamonds get smudged
and soiled. Even when they are not worn, they collect dust. Lotions,
soaps and natural skin oils, can cause development of a film of grime
over the gem and inhibits their brilliance. Diamonds require regular
cleaning so that maximum light can be reflected and refracted giving out
fiery brilliance....
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Diamonds in Bridal Jewelry
Choosing Wedding jewelry holds great importance in one’s
life, as it represents a lifelong relationship of love and commitment.
Diamonds are therefore the unmatched selection and the most popular
option for such an occasion. Diamond jewelry is available in myriad of
beautiful designs. The jewelers also specially designed jewelry for such
occasions and allocate the best quality diamonds for such jewelry. They
keep a good stock of wedding jewelry at all times and try that only
designs which match the latest trends along with all other styles is
available....
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Buying Jewelry from Online (Internet) Stores
Internet has made the world a small place. Beautiful
jewelry from many countries and much more variety and
beauty ever imagined is available on online stores. If
you can get very good quality jewelry at lower prices
with more variety in designs, then online jewelry stores
are always a better choice. And this is true with many
renowned online jewelry websites! Online jewelry
buying.....
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The Diamond Cartel
When a gang of thieves with a stolen bulldozer plowed into London's
Millennium Dome in November 2000 to steal a 203-carat diamond from a
display sponsored by De Beers, Nicky Oppenheimer, De Beers's chairman,
hailed the botched heist as wonderful publicity:
"If only we could do this once every six
months. We could do away with the advertising department altogether."
For more than 100 years, the name De Beers has evoked
all glamour and mystery radiated by a diamond. Through
shrewd marketing and careful manipulation of the market,
the South African company. Learn about the over 100
years of the Oppenheimer family's grip over diamond
trade of the entire world.....
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Read about Diamond History, Diamond Facts..
A symbol of innocence, justice,
faith and strength, the diamond was believed to make its wearers
courageous and victorious over their enemies. When set in gold and worn
on the left side, it held the power to drive away nightmares and soothe
savage beasts. Diamonds were even thought to be so powerful that they
could stop lechery. Diamonds have lured and fascinated us....
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Information Summary...
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Diamond Fluorescence
