Types of
diamonds.
In the world, there is a generally
accepted classification of diamonds, which enables you to determine the quality
of the stone on four indicators: color, cut, clarity and weight in this
article, we'll look at the types of diamonds it is on these four
characteristics.
Classification of diamonds for color is assigned a letter corresponding to
a stone scale GIA, developed in the United States. The classification of
diamonds is the most common, but there are others. The GIA system are
colourless or pale yellow stones.
Types of diamonds to GIA:
Shade
|
Classification of diamonds
(symbol)
|
Colorless
|
D-F
|
More saturated, but practically colorless
|
G-I
|
With almost imperceptible hint of
|
J-K
|
With a
small yellow
|
L-R
|
Tangibly
yellowish stone
|
S-Z
|
Classification of diamonds in the form of cut less stiffer. It is generally
accepted that the gems round shape is the most expensive and beautiful. Types
of diamonds to be cut out, so it should focus only on the exterior decorations.
Gem should shine, play on light wash, it should not be defects and marriage. Gem
diamond is, first of all, the inner game of light. If its not then cut quality.
Types of diamonds by purity also designated by letters. Of course, many
inclusions can be seen with a magnifying glass, but a conscientious producer
always makes a corresponding mark on the product.
So, the classification of diamonds
on clean looks like:
Description
of
|
Classification of diamonds
(symbol)
|
Without
foreign inclusions
|
FL
|
Without inclusions, but with some external defects (scratches, cracks)
|
IF
|
Minor inclusions that can be seen only jeweler using special equipment
|
VVS
|
Small inclusions that can be seen through a magnifying glass with
increased 10x
|
VS
|
Inclusion, easily distinguishable under a magnifying glass 10x
|
SI
|
Large inclusions that can be seen without additional equipment
|
I
|
Types of diamonds in this case are presented in a completely different
price categories. Therefore, pay attention to the cleanliness of the need in
the first place, since the suggested classification of diamonds almost fully
outlines the price range of products – from the most expensive to the cheapest.
Classification of diamonds by weight is simple enough. As is known the
stone a diamond mostly appreciated for the number of carats. However, it should
be understood that other options are equally important. Big Rock category I
(classification of diamonds on purity) can be much more expensive and less
attractive than the average, but the FL.
Types of diamonds by weight:
• To 0.29 carats — small;
• 0.3-0.99 carats — average;
• 1 Carat is large.
When it comes to the first group
here in the calculation of the remaining weight is only same type of diamonds
are assessed in conjunction with other characteristics
Diamond
settings.
Are often two seemingly identical
gems are in totally different ways. This raises the logical question is why is
it so, that determines the value of diamonds? In this article, we will describe
the main characteristics of diamonds, will explain how one item is different
from the other.
The main parameters of the diamond is: cut, color, weight and purity of
diamonds. English is the four C: cut, color, carat, clarity. It is for the '4C'
and graded diamonds.
Diamond
shape primarily determines the quality.
All the characteristics of diamonds
are very complex, but it is more difficult for others. the most valuable gem
diamonds are round in shape with the 57-th sides. The diamond settings are such
that through the upper part of the light passes inside and comes out again,
creating shine and unimaginable game highlights. Contrary to the opinion of the,
not the shape of the stone is the most important, and the quality of cut and
the proportions of the diamond characteristics, specified in the passport of
the products, include identification of cut. Most valuable and correct is the
one that is indicated by the letter 'a'.
The diamond
color is a matter of taste, but not always.
In determining the quality of the
diamond options also include color Jewelry Diamond. in this case, the stones
are divided into fantasy and traditional. Traditional diamonds are colorless
gemstones (most valuable, clean), as well as diamonds with yellowish diamond
characteristics, however, are such that, together with the first group of securities
are bright gold, and black diamonds carbonado, are very rare. Fancy-colored
diamonds are blue, pink, green, red, and so on. The characteristics of diamonds
and cross-checked with the GIA. (D) it is a colorless diamond, and Z is a
saturated yellow (Golden). All the diamonds that are placed below the marking Z
are fancy.
The value of
a diamond depends on the weight.
Diamond Options include weight,
which, as is well known, is measured in carats, one carat is 0.2 grams.
parameters of the diamonds in this case: small (up to 0.29 carats), medium
(0.3-0.99 carats), large (1 cr.).
And 'closed' characteristics of
diamonds clarity. The jewelry includes the availability of internal and
external defects. Discern their help Loupe with magnification 10х and bright
light are often external imperfections are corrected by grinding, but it can
affect other parameters such as the weight of diamonds, diamond characteristics
deteriorate. Transparency of diamonds is determined by GIA international
system.
Clean
diamonds.
This article we offer you useful and
detailed table that will help you better navigate the legend tag on jewelry,
and also understand how is the purity of diamonds in the table we present the
legend of GIA with clarification (the purity of diamonds is estimated to be in
the United States) to GIA diamond clarity is denoted by the letters.
Clean
diamonds in table:
Feature
|
The GIA
system designation with a breakdown of
|
Free from defects: absolute
purity of diamonds
|
F: Flawless
|
Minor defects which can be
removed by polishing
|
IF: Internally Flawless
|
Through the Pavilion with 10x
are the smallest inclusions that can be removed by buffing
|
VVS1: Very, Very Small Inclusions
|
Through the pad when you
increase 10 x are the smallest inclusions that can be removed by buffing
|
VVS2: Very, Very Small Inclusions
|
When you increase 10x can be
seen with some difficulty small inclusions
|
VS1: Very Small Inclusions
|
When you increase 10x can be
much easier to detect small inclusions
|
VS2: Very Small Inclusions
|
When you increase 10x quite
easily detected small inclusion
|
SI1: Small Inclusions
|
When you increase 10x very
easily detected small inclusions
|
SI2: Small Inclusions
|
Include visible even to the
naked eye. These defects can affect the quality of the stone, its durability
and strength. Sometimes the purity of diamonds so low that lost transparent
gem.
|
I1
I2 I3: Imperfect |
From what is diamond clarity? Diamond jewelry is first and foremost a
mineral. Therefore, these stones can have a different inclusion of natural
origin, as well as surface defects. The purity of a diamond is just the number
of inclusions, and than their smaller, so more value is a gem.
How is the
weight of a diamond is measured and what.
As you know, the weight of a diamond is measured in carats. The name comes
from the seeds that were used to determine the mass of precious stones. Weight
Carat is 0.2 grams.
Weight Carat today do not translate to grams. The weight of a diamond is
determined by means of special karat weights. With less than 0.01 carat
diamonds are diamond little.
Is a category of rare diamonds —
stones auction. Such are considered collectible copies, historical relics, or
simply investing. The diamond must be over 6 carats to be put up for auction.
An interesting fact is that the weight of the CT until the end of the 19
century has fluctuated. This was due to the fact that different countries used
different equivalents, and the overall measure suggested in the year 1907. The
standard introduced by the International Committee for weights and measures.
The first country to adopt weight carats in the 0.2 g, became Spain, in 1908.
The latest approved, weight carats of Africa, in the year 1923. Now this system
of measurement of mass is international.
Determine the weight of a diamond by using weights, and if the stone is
placed in a frame, you can do it, use the diamond size. This, of course,
possible error.
Offer you a table matching 'diamond
weight/size' data applicable to diamonds cut diamonds, because of the size of
the girdle is made (the diameter of the widest part).
The diamond size, mm
|
Diamond weight, carat
|
The diamond size, mm
|
Diamond weight, carat
|
3,8
|
0,2
|
9,1
|
2,75
|
4,1
|
0,25
|
9,4
|
3
|
4,4
|
0,33
|
10
|
3,5
|
5,1
|
0,5
|
10,4
|
4
|
5,3
|
0,6
|
10,8
|
4,5
|
5,7
|
0,75
|
11
|
5
|
6,2
|
0,9
|
11,3
|
5,5
|
6,4
|
1
|
11,7
|
6
|
6,9
|
1,25
|
12,4
|
7
|
7,3
|
1,5
|
13,1
|
8,5
|
7,7
|
1,75
|
13,5
|
9
|
8,1
|
2
|
14
|
10
|
8,5
|
2,25
|
15,1
|
12,35
|
8,8
|
2,5
|
16
|
15
|
There is also a more complicated formula that estimated the weight of the
diamond. It looks like this:
Diamond weight (Carat) stone height
(mm) x diameter rundista2 (mm) × 0.0061
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