Since 1942
Traditional and Modern Fashion in an Avant-Garde Jeweller's
Diamonds - Our Own

Our diamonds are categorically "Ideal Cut", also known as "Hearts & Arrows", the most perfect cut, carried out under the strictest quality standards, certified in their cut as triple "excellent" by the most prestigious gemological laboratories in the world.

Cut and polished by the best master cutters on the Earth, with an obsessive concept of perfection, the ISEE2 diamonds are considered to be unique. Less than 1% of the diamonds cut in the world reach such a level of perfection and beauty.

However, it is possible to recognise their perfection. Even an unskilled or non-specialist person can do it. An ISEE2 diamond can be easily distinguished through the splendour of its extraordinary brilliance, scintillation and absolute symmetry, capable of expressing what words cannot.

All these diamonds reach a value greater than 9 on a scale from zero to ten in the beauty evaluator shown in the video.

Our commitment is not only to quality but also to integrity. These diamonds comply meticulously with the Kimberley process set up by the United Nations to prevent the marketing of "conflict diamonds" or blood diamonds" , to avoid any kind of labour exploitation or child slavery.

At CANTELIJOYEROS we enjoy the trust of ISSE2, who have granted us the exclusive distribution of their diamonds.

Call us and you will be able to see the enormous difference between a commercial diamond and a perfect one. We will be delighted to show you without any obligation.

Diamonds - Its Origins

The diamond is the hardest precious stone and yet its chemical composition is the simplest, since it is made up of pure crystallised carbon.

Its melting point is two and a half times higher than that of steel and approximately 4,000 degrees Centigrade are necessary to melt it. It is taken as a reference point with the maximum value - ten - on the Mohs scale of hardness (from 0 to 10).

Its name comes from the Greek "adamas", which means "unconquerable" and until the XV century kings wore it as a symbol of their strength, courage and invincibility.

Large amounts of mineral need to be extracted and processed to obtain one diamond. Less than 50% of the diamonds obtained have gem quality and even less are big enough for it to be worth cutting them.

A rough diamond, without being cut, is like a pebble which arouses no interest and it is the skill of the cutter which brings out its hidden beauty. A diamond can be cut in many different ways. The best known are: brilliant, princess, pear, marquise, emerald, oval and heart.

Their rather mysterious origin - millions of years ago - is attributed to the magma that there is at great depths in the centre of the Earth, where the high pressure and temperature make the miraculous transformation of carbon into diamond possible.

The large volcanic masses carried the diamonds from the centre up to the Earth's surface and, on cooling, formed the Kimberlite pipes, places where today you can find the main diamond fields.

There are other less technical and more romantic versions regarding their formation. The ancient Greeks believed that they were fragments of stars: some even identified their origin with tears from the gods.

Diamonds - The 4 C's

The value of a cut diamond is determined by four characteristics, known as the "4 C's":

1) Carat. This measures the weight and therefore the size of the diamond. The measuring unit is the carat and is equivalent to 0.20 grams. It is obvious that - with all other things being equal - its value increases with its size. Its price per unit of weight (Euros/carat) increases considerably as its size increases, due to the difficulty in obtaining large, good quality diamonds.

2) Clarity. The great majority of diamonds have very small inclusions and internal characteristics produced during the crystallisation process. The greater these are, the less is the value. In a diamond which has no internal or external inclusions, there is nothing to prevent light passing through it cleanly. Depending on their purity, they are classified from "flawless" (under 10x magnification) to those which have inclusions visible to the naked eye (piques).

3) Colour. The so-called white or colourless diamonds apparently have no colour although they can show a slight more or less yellowish colouring. Their value decreases with the increase in colour. They are classified from the exceptional white colour or "D" colour through the alphabet to the yellowish or "Z" colour. Fancy diamonds, which follow other classification and evaluation standards, start from the colour "Z".

4) Cut. The cut must not be confused with the shape in which it has been cut since this is a mere question of taste and does not materially affect the value of the diamond. When we talk about the cut, we refer to the perfection and polishing of the facets of the diamond, to their proportions and symmetry and it has an extraordinary influence on its brilliance, its sparkle and, in a word, its beauty. In fact, a bad cut can reduce the value of a diamond with good internal quality.

The first three "Cs" are due to its very nature. The fourth, the cut, is the only characteristic which depends on the know-how of the cutter, on his skill to extract more brilliance, more sparkle and more light from the rough diamond and to reveal its beauty and internal fire.

When you buy a diamond, you must take into account a very important fifth "C": that of the Confidence inspired in the buyer by the professional consultant so as to get a good choice.

WEIGHT
CLARITY
Characteristics
IFWithout internal characteristics
VVS1Very, very small internal characteristics
VVS2
VS1Very small internal characteristics
VS2
SI1Small internal characteristics
SI2
I1With internal characteristics
I2
I3
COLOUR
C.I.B.J.O.ScandinaviaGIA
Exceptional whiteRiverD
E
Extra
white
Top WesseltonF
G
WhiteWesseltonH
Grayed out
white
Top crystalI
CrystalJ
Little
colour
Top
Cape
K
L
ColourCapeM
N
YellowO
P
Q
R
S
T
U
V
W
X
Y
Z
Diamonds - Ideal Cut

The Hearts & Arrows cut is universally known as the ideal diamond cut. It is based on the mathematical calculations carried out by the Belgian engineer Marcel Tolkowsky on the behaviour of light in the diamond, its refraction and reflection, so as to specify the angles and proportions to get an optimum balance with brilliance and so free its internal fire.

The history of a Hearts & Arrows diamond begins with the choosing of the best rough stones and the work of the best cutters together with the most advanced techniques available since their standards are extremely rigorous as regards shape, size and the arrangement of its facets and it requires absolute physical and optical symmetry to become a unique perfect diamond of great beauty.

When a Hearts & Arrows diamond is looked at from the pavilion, (the lower part), a circle with eight perfect hearts can be seen. If we look at it through the crown, (the upper part), eight arrows can be made out.

Besides their extraordinary quality and beauty these diamonds come from companies which, following the instructions given by the United Nations, have adhered to the Kimberly process, which tries to avoid the marketing of the so-called "blood diamonds" used to finance conflicts aimed at destabilising legitimate governments.

This is the absolute guarantee that the rough diamonds have been purchased from legal suppliers and have at all times been handled complying with what is internationally known as "good practice", specifically avoiding the use of any form of abusive labour or child slavery.

AENOR Commercial Quality
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