| |
 It is very important to
buy loose diamonds during daylight, on a fine weather day and with a northly exposure. It is under these conditions
that the true color of the stone will appear. |
| |
 |
| |
In the absence of these
conditions, it will be preferable to use a lamp which has a reproducing daylight
bulb. In all good jewellery shop, you will be able to find these lamps
which are equipped with special bulbs and which are useful for grading diamonds. A neon lighting is not recommended. |
| |
|
| |
A certificate will have to be required for the
purchase of loose diamonds higher than 0.50 carat. This certificate will have to be made by an
international laboratory of gemology. You will find a list of these laboratories in the item
entitled: certificate. |
| |
|
| |
Always check the diamond characteristics. Indeed, if a
jeweller proposes to you a 1.00 carat round diamond
which does not have a certificate, if he says to you that this diamond is
classified F (color) and VS1 (clarity). This diamond would cost approximately
US$ 16,625 (retailer price). But, if its clarity is really VS2, the price falls to
US$ 14,000; 16% less (US$ 2625), a rather
significant price difference! |
| |
|
| |
Importance of the certificate: with the true identity
card of the diamond, you will know precisely the diamond that you are buying. But be careful,
a certificate is not a guarantee of quality, indeed, a diamond can have a certificate but can
be of bad quality (bad clarity, color, proportions, polish, symmetry,
fluorescence, etc...). Importance of knowing « decipher » a certificate and read it entirely. A small sentence on the
certificate, like « Clarity enhanced » or « Color enhanced », will have to make
you react: you are in the presence of a diamond whose clarity or color was
modified artificially. The price of these diamonds very strongly
falls (-60 to -80%). If you know 4 C's (carat-weight, color, clarity, cut) you wil
know the diamond prices in the trade. For that you can go and click to a item
« diamond prices » to compare the jewellery
price and the price posted in our item, if you notice a great difference between the two prices, beware!... |
| |
|
| |
There are not only the 4 principal diamond criteria
(carat-weight, color, clarity, cut) which are important for a diamond
purchase. Indeed, its proportions, its fluorescence, its
finish are other criteria very important. A diamond of very good
clarity and very good color, but which has a very strong fluorescence or a
poor proportion sees its price strongly falling:
Choose
a None or Slight diamond fluorescence, avoid Strong or Very strong grades.
Choose a Excellent, Very Good or Good diamond proportions.
Choose a Excellent, Very Good or Good diamond polish, avoid
Medium or Poor finish grades. |
| |
|
| |
Eternal white diamonds are most known to public, but do you
know that there are diamonds in all the colors: blue, red,
pink, green, yellow, black, champagne, cognac, etc... Depending on colors some are
less expensive compare to the same colorless diamond. On the others hands some colors
are even more expensive than colorless diamonds (red, pink, blue, green and certain intensities of
yellows). All this is only one question of mode and personal taste. |
| |
|
| |
There is a price list of polished diamonds
(0.01 carat to 5.99
carats) available on subscription for the professionals, the name is « Rapaport Diamond Report ».
This is not a selling list. This list is very often used by the professional in their
transactions. If you want to know some more about Rapaport Diamond Report, you
can click here: how to calculate diamond prices. |
|
Polished diamond buying advices
