International top certificates
Not all certificates are equal. For your security, we only have certificates from the three leading institutes, GIA, IGI and HRD, in our portfolio. These are independent international testing institutes that have an excellent reputation due to their particularly strict standards.
Once the tests have been undertaken by several experts, the authenticity and quality of the diamonds are recorded in a certificate. The certificate is your diamond’s ID card.
The institutes’ assessments take place according to internationally agreed and accepted criteria.
The 4Cs were developed by the Gemological Institue of America (GIA), which was founded in 1931 and prides itself for being unbiased and reliable.
IGI, the International Gemological Institute has been specialised in analysing and certifying diamonds, precious stones and jewelry since 1975. IGI laboratories and registered offices can be found at diamond hotspots across the globe.
HRD stands for Hoge Raad voor Diamant. This institute is based in Antwerp. A double-coding system guarantees the objectivity of appraisals by HRD.
The sign of love: Hearts & Arrows
At acredo, all diamonds from 0.3ct not only have an international expertise, the best also show Hearts & Arrows.
The sign of love can be seen with a special magnifying lens in this special diamond cut form: eight arrows on the top side of the diamond and eight hearts on the bottom side.
Only around 1% of cut diamonds have this degree of perfection because it requires very special angle and length ratios. This is the only way to achieve absolute symmetry.
Brilliant-cut diamonds with Hearts & Arrows excel with an outstanding sparkle. Rare treasures from the depths of the earth.
Choice of cut
Value performance of diamonds
Diamonds concentrate a very high value in a very small space. The price performance of diamonds is relatively stable. Other assets such as gold or stocks are subject to higher volatility.
The price of diamonds has been on a steady increase for over 30 years. The diamond market was only marked by more material price fluctuations between 2008 and 2011.
Price performance can depend on the size of the stones. The price of larger stones increases at a slower pace.
As the annual demand for diamonds continues to increase and the primary and secondary deposits become depleted, experts expect to see prices rise in coming years.
acredo brings you diamonds at an excellent price-quality ratio. Let our specialists advise you.
Diamonds as an investment
The Diamond: king of all precious stones
It is rare, it is made of resistant material, it sparkles in all directions: the diamond is derived from the Greek word "adamas" (invincible). It is not surprising that it is referred to as the king of all precious stones. And as the king, it has even more to offer: it reflects up to 100% of the incoming light and therefore has the highest refractive index of all precious stones with a value of 2.42. The diamond is one of the hardest known minerals in the world and scores 10 on the Mohs scale of mineral hardness. Diamonds are rare and very difficult to obtain because they are formed under great pressure at a high temperature of 1700°C and at a depth of 150 to 200 kilometres. Today, great efforts are needed to extract diamonds both from open-pit mines and underground mines as well as from offshore mines. Only a quarter of these natural treasures are suitable for use in jewelry. Therefore, diamonds are a precious token of love.
The 4 Cs: determining the quality of a diamond
Carat, clarity, color and cut are the so-called four Cs, used to judge the quality of diamonds. The expression carat is named after the seeds of the carob tree due to their weight (200 milligrammes) and has been used to weigh diamonds across the world since 1875. The price of a diamond depends very much on its clarity. The fewer inclusions a diamond has, such as crystalline structures or other minerals, the higher the classification and the more expensive it is.
If no inclusions are visible in the diamond under tenfold magnification, the diamond is classed as flawless and is regarded to be particularly valuable.
The color also determines the price of a diamond. Colorless diamonds are very popular and expensive, especially in the world of jewelry. However, fancy diamonds in colors like red, blue and black are also very valuable due to their rarity.
In contrast to the first three components, the cut of the diamond is influenced by the specialists. The cut as well as the proportions determine the brilliance of a diamond. Diamonds can be cut with the round brilliant cut, the square princess cut or the rectangular baguette cut, in a heart shape, oval, marquise, or pear shape.
International top certificates at acredo
You will receive a top international expertise for each diamond from 0.3ct purchased at acredo. For your security, we only use certificates from the independent, international institutes GIA, IGI and HRD. In addition to the dimensions of the diamonds, these certificates include the criteria shape, weight, color, clarity, polish, symmetry, proportion, and fluorescence. Each diamond is as unique as your love and has therefore been assessed and classified by several specialists according to different hard criteria.