Like a fingerprint, each diamond has distinctive characteristics.
The 4Cs - colour, clarity, cut and carat weight - are the quality standards or characteristics of diamonds that are recognised worldwide.
SIZE
The cut is what determines the quality and brilliance of a diamond. If a diamond is not cut correctly, it will appear duller, even if it has a high colour and clarity grade. If a diamond is cut well, it will reflect and refract light for maximum brilliance and sparkle, creating what we call a high dispersion.
(web: Nivoda)
There are three factors that determine the cut of a diamond:
- Precision of the cut. The cut itself: Relationship of the size and angles to the different parts of the stone.
- Symmetry: The precision with which the different facets of the diamond are aligned and interlocked.
- Polishing: The details and placement of facets, as well as the external finish of a diamond
The quality grade of the cuts according to the GIA certified diamonds we work with at Blasco Joyero is Excellent, Very Good, Good, Acceptable and Poor. We always work diamonds in the three Excellent or Excellent/Very Good factors. Many of the diamonds we work with are triple excellent.
Blasco Jeweller
PURITY
Clarity is a measure of diamond purity and rarity classified by the visibility of possible inclusions and features under 10x magnification. It is important to note that purities from VS1 and VS2 are good purities because, from that range, we need a 10x loupe to be able to appreciate, depending on its location and sometimes with difficulty, any possible slight inclusions.
At Blasco Joyero we will recommend purities from VS depending on the size of the diamond and always choosing very well so that, in the case of a very slight inclusion, it is in a different place to the central part of the diamond table. Within the inclusions of the diamond we can find several types, also here is important our detection advice.
(web: GIA)
Purity table:
Def. | Meaning (English) | Explanation |
IF | Internally flawless | Impeccable, except for possible superficial traces of processing. |
VVS1/VVSI | Very, very small inclusions | Inclusions are extremely difficult to detect, even for trained experts under 10x magnification. |
VVS2 | Very, very small inclusions | Inclusions are extremely difficult to detect, even at 10x magnification. |
VS1/VSI | Very small inclusions | Inclusions are very difficult to detect, even for trained experts under 10x magnification. |
VS2 | Very small inclusions | Inclusions are difficult to detect, even at 10x magnification. |
SI1 | Small inclusions | Inclusions are detectable to trained experts and at 10x magnification. |
SI2 | Small inclusions | Inclusions can be detected at 10x magnification, but not with the naked eye. |
PI1 | Pique I | Inclusions can be detected with the naked eye, but do not reduce the brightness. |
PI2 | Pique II | Inclusions can be detected with the naked eye, they reduce the brightness. |
PI3 | Pique III | Inclusions can be detected with the naked eye, they reduce the brightness considerably. |
(web: GSE)
COLOUR
Colour identifies the natural hue inherent in white diamonds. In nature, most white diamonds have a slight yellow hue. The more "colourless" it is, the rarer the diamond. The industry standard for colour grading is to evaluate each stone against a "master set" and assign a grade ranging from "D" (colourless) to "Z" (light yellow) as graded by the GIA laboratory.
At Blasco Joyero we work with a large part of River and Top Wesselton diamonds.
COLOUR SCALES | ||||
GIA | Antwerp | Scandinavian | IGE - CIBJO - HRD | |
D | 0+ | RIVER | EXCEPTIONAL WHITE+ | |
E | 0 | EXCEPTIONAL WHITE | ||
F | 1+ | TOP WESSELTON | WHITE EXTRA+ | |
G | 1 | WHITE EXTRA | ||
H | 2 | WESSELTON | WHITE | |
I | 3 | TOP CRYSTAL | WHITE WITH LIGHT COLOUR | |
J | 4 | CRYSTAL | ||
K | 5 | TOP CAPE | LIGHT COLOUR | |
L | 6 | |||
M | 7 | CAPE |
COLOUR | COLOUR 1 |
N | 8 | |||
O | 9 | LIGTH YELLOW | COLOUR 2 | |
P | 10 | |||
Q | 11 | COLOUR 3 | ||
R | 12 | |||
S | 13 |
YELLOW |
COLOUR 4 | |
T | 14 | |||
U | 15 | |||
V | 16 | |||
X | 17 | |||
Y | 18 | |||
Z | 19 | |||
(web: GSE)
QUILATES
Carat weight can appear in various ways in different diamond shapes. A diamond can have a different carat weight without appearing larger, and two diamonds of the same carat weight can have a different size depending on the depth of cut. Carat weight alone does not determine the value of a diamond. For example, two one-carat stones can vary significantly in price when purity, colour and cut are taken into account. One carat is equal to one-fifth of a gram.
At Blasco Joyero we have a multitude of solitaires mounted in white gold and yellow gold with certified diamond weights from 0.20 carats to 2 carats. The best sellers are 0.30, 0.40 and 0.50 carats, especially for engagement or engagement ring gifts.
Blasco Jeweller
ORIGIN OF OUR DIAMONDS
Very important to us is our compliance with Kimberley Process Certification: We guarantee that our diamonds come from legitimate sources not involved in economic or military conflicts and in accordance with the United Nations Resolutions, the Kimberley Process Certification Scheme as well as the International Assurance Scheme.
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