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Carat - Weight

The weight of a diamond is given in carat

Color - Color

The whiter / more colourless a diamond is, the more valuable it is

Clarity - Purity

This unit determines the purity of a diamond

Cut - Cut

The cut is the most important criterion of a diamond

123GOLD premium selection

Cut: excellent

Polishing: excellent

Symmetry: excellent

Certificate: GIA

Fluorescence: none

Price: unbeatable

All diamonds are available immediately, from warehouse

From certified diamond to dream ring

Design your personalized diamond ring easily and uniquely.

 Engagement Rings


The highest quality at the best price

 Engagement Rings


Choose from an infinite variety of types of settings and alloys

 Engagement Rings


In the next step, choose the ring size and the engraving

 Engagement Rings


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Choose the best security and transparency for your diamonds.


Only a recognized certificate gives you the certainty of the authenticity of a diamond. However, the evaluation framework in this case is broad. For this reason, we, at 123GOLD, have decided to collaborate exclusively with the best and most recognized laboratories. The most reliable analyzes confirm both us and our customers that indeed the quality mentioned is the right one, and thus the diamond has the right value.


The best „quality label“ for diamonds

100% surety and guarantee

Certificate of authenticity and proof of ownership

Your Jewelry with Certified Diamonds

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When choosing a diamond, you need to be sure that the diamond meets the high quality criteria and therefore its value.

Terms such as "flawless" are most familiar to buyers - the least it is clear, however, that this quality feature alone is not enough.

The quality of a diamond is determined by the 4 C's.

The weight of a diamond is given in carats (abbreviated "ct."). 1 carat corresponds to 0.2 grams and is divided into 100 points. Therefore, a half carat weighs 0.1 grams and has 50 points. The weight of a diamond should not be confused with its size, which is also influenced by its dimensions and the way it is cut.

The word carat comes from the Greek "Keration", which stands for the fruit of the carob tree, a miracle of nature: each full-grown seed weighs exactly the same, namely 0.2 grams. This is why these seeds were used by jewellers in ancient times as a reliable unit to determine the weight of gold and precious diamonds, and why a metric carat still corresponds to 0.2 grams today.

Diamonds of all sizes are used in jewellery; brilliants from ¼ carat upwards are particularly suitable for solitaire rings. The table below gives an overview of the different sizes of diamonds and their diameters. The diameter is approximate, as it can vary depending on the way the diamond is cut.

Stone carat schema

Diamonds come in all colours of the rainbow. In principle, the more colourless the diamond, the more sparkling and valuable it is. The most precious specimens are diamonds in the colour 'River' (very fine white), followed by 'Top Wesselton' (fine white) and 'Wesselton' (white, standard quality).

Depending on the laboratory, the colour of diamonds is defined differently.
River, the least colourful, blue-white diamond, corresponds to the letters D and E.
F and G are used for the fine white of Top Wesselton and
diamonds with the colour Wesselton are white and are indicated with the letter H.

The so-called Fancy Diamonds, also called Fancies, clear and evenly coloured diamonds, have an even higher market value nowadays. Fancies account for only 1 percent of the worldwide production. Especially intensely red and pink coloured diamonds are very rare and therefore expensive. The currently most expensive diamond in the world, a pink-coloured emerald-cut brilliant with a weight of 24.7 carats, was bought by a diamond dealer at auction for more than 46 million dollars.

Stone color schema

The less other materials are embedded in the diamond, the purer the diamond is. Inclusions refer to embedded minerals, cracks or other imperfections that cause less light to penetrate the diamond. For diamonds used in jewelry, it is important that these impurities are not visible to the naked eye. When diamonds are used as an investment, the degree of purity is of even greater significance. Brilliantly pure diamonds, in which no impurities are visible even under tenfold magnification, are considered the purest diamonds and are therefore extremely rare. The degree of purity is classified as follows:

FLFlawlessfree from inclusions and extraneous features
IFInternally FlawlessFree of Inclusions
VVS1-VVS2Very, Very Small Inclusionsvery, very small inclusions at tenfold magnification
VS1-VS2Very Small InclusionsVery Small Inclusions at Tenfold Magnification
SI1-SI2Small InclusionsSmall Inclusions barely recognizable with the naked eye
P1-P3PiquéClearly visible to the naked eye inclusions

For small diamonds, this classification is used somewhat more broadly. For example, instead of VS1 or VS2, only VS is indicated. However, it is not just about purity, it is also the impurities that make each diamond unique.

All diamonds purchased from 123GOLD have at least an SI quality (small inclusions).

Stone clarity schema

The method of polishing determines the degree of brilliance of a diamond and is therefore the criterion for determining the beauty of a diamond. After all, the proportions are decisive for the reflection of light. The ideal cut ensures extraordinary brilliance, optimal proportions and symmetry. So the better the cut, the more beautiful the brilliance and the better the diamond's proportions. The degree of brilliance varies from "very good" (= perfect brilliance), "good" (= good brilliance), "medium" (= medium brilliance) or "unusual" (= little brilliance); with proportions and symmetry, the deviations increase with decreasing quality of the diamond.

ExcellentOptimum cutBest possible brilliance, no externalities
Very GoodVery Good sharpeningExcellent clarity, few or only minor external features
GoodGood sharpeningGood clarity, some external features
FairMedium sharpeningThe brilliance decreases. several important external features
PoorNot excellent cutThe brilliance is significantly reduced, large and/or numerous external features

Every diamond in a piece of jewelry is cut in a certain shape, the most popular shape is brilliant cut with 57 facets. In addition, there are numerous other shapes such as princess, emerald, heart, oval, marquise or drop cut diamonds.

Cutting comes down to the skill and craftsmanship of the person working the diamond. The goal of perfectly polishing a diamond is the optimal reflection of light through the facets. Well-cut diamonds reflect the incident light almost completely.

Stone cut schema

In order to enjoy your diamond jewelry for a long time, we recommend the 123GOLD maintenance tips for your diamond jewelry.