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Precious Stones - Diamonds

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ROUGH AND CUT-POLISHED DIAMONDS

Diamonds

The Value of Diamonds

There are four criteria to be considered when describing or valuing a diamond: carat weight, colour, clarity and cut, known as the 4 C's.

Each of these will vary from one diamond to another because every diamond is unique.
  • The larger the diamond, the rarer it is.
  • The better the purity, the more beautiful it is.
  • The greater the purity, the more beautiful it is.
  • The better the cut, the more perfect it is.

 

The Magic Of Diamonds

Early in their history diamonds were believed to possess magical powers and many legends surround them.

The people of ancient India believed that diamonds had the power to make them invincible. They used them to adorn the statues of their Gods and their kings wore diamonds as a talisman to ward off evil.

Diamonds were worn in battle as a symbol of courage, and in the Middle Ages many people believed that a diamond could reunite estranged marriage partners.


One story tells that Cupid's arrows were tipped with diamonds. Even today they still retain this magic, for in her heart, every woman believes that a diamond is the symbol of pure and lasting love
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There are diamonds to match all tastes and budgets.All diamonds are beautiful - it is up to the buyer to decide the relative importance he will attach to each ofthe valuation criteria.
 
The Carat

The Carat is the unit of weight for the diamonds.

The Inclusions

Most diamonds contain natural inclusions, which were formed during the crystallisation process. The type, number, size and position of the inclusions determine the clarity of the diamond. Some inclusions are microscopic in size.

 

As long as they do not affect the passage of the light through the diamond, the inclusions will not detract from its beauty.

Subtle variations in the clarity of a diamond can be detected by an experienced professional only after a lengthy and meticulous examination of the diamond using a loupe with 10 power magnification under normal light.

International standards have been drawn up for grading diamonds according to their clarity.For example, the Gemological Institute of America (G.I.A.) system of clarity grading is:

FL
Flawless - a diamond without external or internal flaws or blemishes.
IF
Internally flawless - a diamond without internal imperfections or flaws, but with minor surface blemishes.
VVS 1, -VVS2
Very Very Slightly Included - diamonds with minute surface or internal blemishes that are difficult to locate with a 10x loupe.
VS1 - VS2
Very Slightly Included - diamonds containing minor inclusions clearly visible under 10x magnification.
SI
Slightly Included - diamons with inclusions which are fairly easy to see uner 10x magnification, but not visible, through the crown, with thenakedeye.
I 1
Included 1 - diamonds having inclusions which are quite obvious under 10x magnification and can be seen with the naked eye.
I 2
Included 2 - diamonds with inclusions which can easily be seen with the naked eye and which begin to affect the transparency and brilliance of the diamond.
I 3
Included 3 - diamonds that lack transparency and contain dark inclusions very easily visible to the naked eye.

 

The Colour

Most diamonds used in jewellery appear to be white or colourless to the untrained eye, but , in fact, very few are totally colorless and therefore truly white.

The color of a diamond is important.The closer it is to being absolutely colorless, the more valuable it will be, bearing in mind the other 3 C's required to value a diamond.

The only real way of determining the exact color of a diamond is to place it next to another diamond which has previously been graded.

Internationall standards have been established for grading diamonds according to extremely subtle differences in colour.

INTERNATIONAL SCALE OF COLOURS

C.I.B.J.O.*
G.I.A**
Old Terms
Exceptional White +
D
River
Exceptional White
E
River
Rare White+
F
Top Wesselton
Rare White
G
Top Wesselton
White
H
Wesselton
Slightly Tinted White
I
Top Crystal
J
Crystal
Tinted White
K
Top Cape
L
Top Cape
Tinted Colour (from)
M
From Cape to Yellow
Tinted Colour (to)
N
O
P
Q
R
S-Z
From Cape to Yellow


Rare Coloured Diamonds

Certain natural coloured diamonds are very famous. They are the:

The Conde: a rose-pink, pear-shaped diamond weighing 50 carats, the Conde is one of the most outstanding historical stones. It is to be seen in the Conde Museum in Chantilly near Paris.

The Tiffany: the largest known yellow diamond weighing 128.51 carats. It is cut as a cushion-shaped brilliant and it is on display at Tiffany's New York.

The Dresden: the pear-cut dresden is the largest green diamond in the world and weighs 41 carats.

The Wittelsbach: a fabulous blue diamond weighing 35.32 carats once belonged to King Philip 1V of Spain.

Most diamonds used in jewellery nowadays appear to be "white".

Coloured diamonds form a separate, rare and extremely valuable category of diamonds. They come in all colours - pink, blue, brown, green and even black.More common are the golden or canary yellow colours.

Coloured Diamonds

 

Diamonds - Gifts of Love

The wide range of diamond jewellery styles and designs now available means that it is always possible to find something to match the customer's taste and budget.
Diamond jewellery is the most marvellous gift a man can give to a woman. It expresses deep and sincere feelings of love and affection.

THE DIAMOND ENGAGEMENT RINGS: Some traditions survive in the modern world in spite of all the social and economic changes.The diamond engagement ring is still given to most women before marriage.


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