A Brief Encyclopedia of Diamonds
Discover diamonds. Choose with confidence.
There is something truly special about diamonds – not only their beauty, but also the unique character of each individual stone.
At first, the world of diamonds can seem complicated. Carat weight, color, clarity, cut, certificates and different grading scales can be a lot to take in. That is why we have created this brief encyclopedia to guide you through the essentials in a simple and clear way.
1. Introduction to Diamonds
A diamond is a natural mineral composed of carbon. It forms deep within the Earth's mantle under conditions of extremely high pressure and temperature.
The journey from a rough stone to a polished diamond is a long one. Cutting and polishing give a diamond its shape, character and ability to interact with light, creating the brilliance, depth and sparkle we associate with diamonds.
Every Diamond Is a Little Different
Part of the beauty of diamonds is that no two stones are exactly alike. Two diamonds may have the same weight yet differ in color, clarity, cut, proportions and overall appearance.
This is why a diamond cannot be judged by a single number alone.
Carat Weight Is Only Part of the Story
One of the most common misconceptions is that a larger diamond is automatically better or more valuable.
Carat tells us only how much a diamond weighs. To properly understand a diamond, we need to look at the stone as a whole.
2. How Diamonds Are Graded
Several characteristics are considered when grading a diamond. Together, they shape its appearance, quality and price.
The most important starting point is the 4Cs:
- Carat – weight
- Color – degree of color
- Clarity – internal and external characteristics
- Cut – quality of cut and proportions
Other characteristics may also be considered, including dimensions, proportions, symmetry, fluorescence, shape and polish.
Why Isn't One Number Enough?
Imagine two diamonds weighing 1 ct. One may have an excellent cut, higher clarity and a more colorless appearance, while the other may have less balanced proportions or more noticeable inclusions.
On paper they may initially appear similar, but their appearance and price can be very different.
This is why it is always important to consider a diamond as a whole.
3. The 4Cs – Four Essential Characteristics
The 4Cs provide a simple framework for understanding the basic characteristics and quality of a diamond.
The weight of the diamond.
The degree of color or colorlessness.
The diamond's internal and external characteristics.
The quality of the cut and proportions.
Carat – Weight
Carat is the unit used to measure a diamond's weight. One metric carat equals 0.2 grams.
A higher carat weight generally means a larger diamond, but a heavier stone will not always look larger. Its visible dimensions are also influenced by its shape and proportions.
Larger high-quality diamonds are also rarer, which means their price generally does not increase in direct proportion to their weight.
Color
For traditional colorless diamonds, grading focuses on the degree of colorlessness.
The widely used scale begins with D, representing a very high degree of colorlessness, and continues through Z, where warmer yellow or brown tones become more noticeable.
Differences between neighboring grades can be very subtle. Choosing the highest possible grade is therefore not always necessary. What matters is how the diamond looks as a whole.
Clarity
Almost every natural diamond may contain small internal or surface characteristics.
These characteristics are not necessarily defects. They are often a natural part of the diamond's formation.
When clarity is graded, specialists consider characteristics such as:
- number,
- size,
- position,
- nature,
- visibility.
Higher clarity generally means greater rarity and often a higher price. In practice, however, it can be more useful to consider whether any characteristics are noticeable to the naked eye.
Cut
Cut is one of the characteristics that has a major influence on how a diamond actually looks.
A well-cut diamond can return light effectively to the viewer, giving it a bright, lively and sparkling appearance.
For this reason, a slightly smaller diamond with a better cut may sometimes be more visually appealing than a larger stone with less balanced proportions.
4. Diamond Certification
For higher-value diamonds, an independent grading report is an important part of the selection process.
It is more than simply a piece of paper accompanying the diamond. It is a professional document describing the characteristics of a specific stone and helping you understand what you are buying.
What Can You Find on a Diamond Report?
- report number,
- diamond shape,
- measurements,
- carat weight,
- color grade,
- clarity grade,
- cut information,
- proportions,
- symmetry,
- polish,
- fluorescence.
Well-Known Gemological Laboratories
Well-known gemological laboratories include GIA, HRD Antwerp and IGI.
Each laboratory uses its own grading procedures and report format.
Why Is Certification Important?
A grading report helps you better understand the characteristics of a particular diamond and makes it easier to compare different stones.
5. Diamonds vs. Investment Gold and Silver
Diamonds, gold and silver are often discussed in connection with preserving value. However, they work in very different ways.
| Diamond | Investment Gold | Investment Silver | |
|---|---|---|---|
| Basis of price | Combination of characteristics of the individual stone | Weight, purity and market price of gold | Weight, purity and market price of silver |
| Standardization | Lower – each stone is individual | High | High |
| Price comparison | Requires consideration of several characteristics and certification | Relatively straightforward | Relatively straightforward |
Investment Gold
Investment gold is relatively standardized. Its value is primarily influenced by weight, purity and the current global market price of gold.
This makes individual investment gold products relatively easy to compare.
Investment Silver
Investment silver follows a similar basic principle. Its value is mainly influenced by the amount of metal, purity and the current market price of silver.
For some products, the manufacturer, product type or collectible significance may also influence the final price.
Diamonds
Diamonds are different. Each stone is individual, and its price is influenced by a combination of many characteristics.
- carat weight,
- color,
- clarity,
- cut,
- proportions,
- shape,
- fluorescence,
- certification,
- rarity of the particular combination of characteristics.
This is why diamonds do not have one simple global market price that can be compared in the same way as the price of gold.
What Is the Main Difference?
Gold and silver are relatively standardized commodities.
A diamond is an individual stone. This means that the quality of the particular diamond, its characteristics and its certification play a much greater role.
The Essentials at a Glance
A diamond is about more than size.
Its quality is influenced primarily by the combination of the 4Cs – Carat, Color, Clarity and Cut.
For higher-value stones, a reliable independent gemological grading report is an important source of information.
While gold and silver are relatively standardized commodities, each diamond needs to be considered individually.
Once you understand these basic principles, comparing and choosing diamonds becomes much clearer and more natural.