Each diamond is a unique natural product and is rarely completely ‘flawless’. Clarity is determined on the basis of the number, size, lightness and location of 'inclusions', as foreign bodies or flaws in the crystal are known. The smaller and fewer inclusions a diamond has, the higher its value and clarity. The official grading scale ranges from FL/IF (flawless) to P3 (obvious inclusions visible to the naked eye). Most inclusions are so small that they are only visible under 10-fold magnification and thus do not impair the beauty of the stone. RENÉSIM supplies diamonds in grades FL to SI2. In the categories FL to VVS2, inclusions are so small that they are invisible to the naked eye. In grades VS1 and VS2 inclusions are only visible under a microscope.

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SI2
SI1
VS2
VS1
VVS2
VVS1
IF
FL

Colour

Although diamonds can be found in all colours, over 90% of them have yellow tints from virtually colourless to visible yellow. As a general principle, the more colourless ('white') a diamond is, the higher its value. Light passes easily through a colourless diamond and is reflected to best effect. Diamonds are classified using a scale ranging from D to Z, in which D stands for the best and most colourless (whitest) diamond. RENÉSIM only supplies diamonds in categories D to M. Our diamonds thus have only a very slight yellow tint or are completely colourless.

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We advise you personally

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Only conflict-free diamonds

Buy diamonds online at RENÉSIM

Diamonds – the coveted classics among gemstones! To ensure that choosing your diamond is a unique experience and that you can enjoy it for a lifetime, we would like to familiarize you with details about the gemstone with its very special sparkle.

Buying a diamond is something very special - and of course the result should be exactly as you imagined it! But it all starts with the question of where is the best place to buy diamonds. And what do you have to look out for when buying a diamond

RENÉSIM offers you a selection of over 250,000 gemstones using a user-friendly diamond database. Thanks to this variety, we can offer you the most beautiful and exclusive diamonds available on the market worldwide. However, thanks to the simple operation, you can quickly and easily find your very own personal favorite.

Quality characteristics – the diamond and its 4Cs

A large selection naturally also brings with it a lot of decision-making options - the four Cs (4Cs) are important factors to help you find your way. 'What do you have to consider when buying a diamond? and 'Which diamonds should you buy?' - these two questions can be easily answered using the following criteria:

Darstellung der unterschiedlichen Schliffarten von Diamanten

CUT – the cut of the diamond

The cut is the most important criterion of the 4Cs. Unique symmetries and balanced proportions, not too flat and not too high - the precise facets of a diamond must be harmonious. This is the only way to ignite the extraordinary beauty and fire in the diamond that makes it so desirable.

Darstellung des Zusammenspiels von Diamantgröße und Diamantgewicht

CARAT – the weight of the diamond

Most buyers know that diamonds are measured in carats, but what exactly does it tell us if a diamond, for example, has 1 carat?

Carat (abbreviation ct) is the unit in which the weight of a diamond is measured – one carat corresponds to 0.2 grams. Basically:

All other factors being equal, diamonds with a higher carat weight are more valuable than diamonds of lower weight.
The carat unit only indicates the weight, not the size of the diamond. For example, a 2-carat diamond is not automatically twice as large as a 1-carat diamond, even though it weighs twice as much.

Find out more about the interaction between diamond size and diamond weight for different cuts:

To the diamond size & weight tab

Darstellung der Farbgebung von Diamanten mit Hilfe einer Farbskala, welche mit D (= farblos) beginnt und bei bis Z (= gelblich) endet

COLOUR – the colour of the diamond

The appearance of a diamond is particularly influenced by its color. The color scale ranges from D (colorless) to Z (yellowish). The finer the white, the more valuable a diamond is, because a colorless diamond emits white light in the color spectrum of the rainbow. In principle, colors D to F are classified as colorless, while colors G to J are considered almost colorless. At RENÉSIM you only receive diamonds that have no or only a very slight yellow tint and therefore meet our high quality requirements.

D and E: Very fine white
F and G: Fine White
H: White
I and J: Lightly tinted white
K, L and M: Tinted White
N to Z: Clearly tinted

More intense colors, which are deeper than color Z and have a stronger color, are not classified as less valuable gemstones in the diamond color scale, but as rare and particularly valuable fancy dimaonds .

Darstellung der unterschiedlichen Reinheitsgrade von Diamanten

CLARITY – the purity of the diamond

Each diamond is unique and rarely 'flawless' - that is, without inclusions. These so-called inclusions are natural impurities in the diamond and are classified according to a clarity scale. The official rating ranges from FL/IF (flawless) to P3 (coarse inclusions). At RENÉSIM you get diamonds with clarity levels FL to SI2 - inclusions are usually not visible to the naked eye. Flawless diamonds are very rare and therefore extremely valuable.

FL – flawless | flawless
IF – internally flawless | flawless
VVS1 & VVS2 – very, very small inclusions
VS1 & VS2 – very small inclusions
SI1 & SI2 – small inclusions
I1, I2 & I3 – inclusions

In addition, all diamonds from RENÉSIM come with a certificate issued by an independent gemological testing institute. This guarantees the authenticity, quality and origin of your diamond and thus offers you essential security. Thanks to long-standing personal contacts, we are also able to source our diamonds from the largest, most reliable and most reputable diamond dealers in the world. We pass these advantages on to our customers in the form of excellent conditions.

Would you like to expand your diamond knowledge even further and find out more? Then take a look at our diamond lexicon - here you are guaranteed to find all the information you are looking fo

RENÉSIM – the largest online database for diamonds

Our database contains over 250,000 diamonds - a huge selection - and we only select diamonds that meet RENÉSIM's high standards. You can filter and sort the diamond selection according to your preferences using various criteria, so you are sure to find what you are looking for quickly and easily. Whether you are looking for diamonds in a brilliant cut, princess cut, emerald cut, Asscher cut, marquise cut, oval cut, radiant cut, pear cut, heart cut or cushion cut - you are guaranteed to find the diamond you want in our database!

Buying valuable diamonds is of course a matter of trust. However, to allay your concerns, we attach great importance to providing you with security through our additional services. At RENÉSIM, we always give you a 100% satisfaction guarantee. We promise, among other things, a 14-day right of withdrawal, competent and exclusive advice from the RENÉSIM service team, a tested payment system and extremely secure shipping: We assume full liability for your diamond until the shipping service provider safely hands over the RENÉSIM package to you.

Join RENÉSIM in your search for the perfect diamond – we will do our best to fulfill your wishes!

Personal advice

With us, you always have the choice of whether you want to choose the perfect diamond yourself from our database or whether you want to take advantage of our advice. Our advice is based on years of experience by a comprehensively trained team of qualified mineralogists and gemologists certified to expert level. The advice can be given by phone, email or on site in our stores in Munich or Vienna. On site in Munich or Vienna, we also offer you the service of viewing the laser inscription of your diamonds under the microscope yourself.

Right of withdrawal

At RENÉSIM, you enjoy the full legal right of cancellation when purchasing online, as you would expect from a reputable German or Austrian provider. We do not relativize or exclude the right of cancellation for loose diamonds through clauses in the small print. At RENÉSIM, you always have the full right of cancellation - no ifs or buts. Contact us if you would like to find out more.

Investment

There are many reasons to use diamonds as part of your personal investment strategy: The concentration of value in a very small space is a unique property of diamonds. As a scarce and finite commodity, diamonds show a comparatively continuous increase in value, which also historically has hardly correlated with the performance of other assets. In rarer qualities and/or sizes, the performance can be even more dynamic. The high portability ensures that diamonds can be easily carried around in all situations. Last but not least, diamonds offer an emotional return due to their beauty. We are not financial advisors, but we would be happy to inform you about which diamonds have historically developed particularly well in value and are particularly in demand. We would also be happy to advise you on putting together an investment package consisting of several diamonds.

Resale

Our specialization is to enable you to purchase the best diamond at the best price. We achieve this through gemmological expertise, the best international contacts and our database: Our offer was the first and is still the largest and longest optimized of its kind in the German-speaking world.

When it comes to the topic of resale, our clear recommendation is: If you have purchased a diamond as a private individual, we can only recommend reselling it to other private individuals. We do not consider purchase “promises” from dealers to be very realistic. If you would like to know how we can support you in reselling diamonds purchased from us to a private individual, please feel free to contact us.

Guaranteed natural diamonds

In our diamond database you will only find certified diamonds of natural origin. For our jewelry with lab grown diamonds please click here.

We are here for you

Tell us what you want - and we will make it possible. Whether in person in our Munich store, by phone or online - just talk to us.

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