Loose diamonds that are not yet inlaid are also available at Belgium Diamond House, catering to the needs of the more demanding customers. Without any embellishment, customers can examine the characteristics inside the diamonds in detail and thus differentiate the quality more accurately.

Customers are also free to exploit their creativity in choosing the styles to go with their selected diamonds. Our in-shop craftsmen would then proceed with the inlay procedure and customers could enjoy observing the entire process.

Furthermore, all diamonds offered by Belgium Diamond House are certified by authoritative gemological organizations such as HRD, GIA, IGI, EGL, and AGS. Customers are ensured that all diamond purchases made at Belgium Diamond House are of the highest quality.

A quality diamond cut too deep or too shallow would have some of its light escaped through the base, directly disturbing its fire and brilliance and subsequently dulling its charm. Diamonds cut to good proportions, on the other hand, would reflect light dazzlingly. Therefore, only the hands of a master cutter could reveal the true brilliance and fire of a diamond in ultimate beauty.

The colour of every piece of diamond varies slightly. As seen from the chart, the different natural hues are classified into 23 grades starting from D to Z. The most rare and valuable is the colourless grade D, while colours of grades M to Z are recognizable with the light yellow grade Z being the lowest of all.

The colour of a diamond plays a crucial role in determining its worth. While "colourless" diamonds are extremely rare and valuable, the most common are "near colourless" and "light yellow". The rarity and worth of a diamond directly relate to its intensity of whiteness. Similarly rare are "coloured diamonds" that are even more precious than their colourless relatives.

Every diamond contains natural "birthmarks" in the form of minute traces of other minerals arisen during the crystallization process. The type, distribution, shape, colour and size of these intrusions determine the clarity of a diamond. They interfere with the passage of light inside a diamond, thus bringing down its brilliance. The more and larger the intrusions are, the greater the influence would be.

A higher clarity indicates fewer inclusions. Highly trained experts would determine the clarity of a diamond with a 10-power magnifying loupe recognized by GIA, giving it a self-explanatory grade referred to the table below. In general, the fewer defects a diamond contains, the higher its worth would be. Most diamonds graded S1 or above do not reveal inclusions visibly to the naked eye.

A diamond’s weight is measured in carats. For two diamonds carrying the exact cut, colour and clarity, the value goes up with the weight. One carat is equal to 0.2 gram, and is divided into 100 points.

As shown on right, a diamond of 25 points would be labelled as 0.25 carat, and so on.

Two diamonds of equal carat weight could be of very different values depending on their cut, colour and clarity.


Loose diamonds that are not yet inlaid offered by Belgium Diamond House are all of first-rate quality authenticated by respected gemological organizations such as HRD, GIA, IGI, EGL, and AGS.

The certificate of each piece of diamond states accurately its weight, carat, characteristics, cut, and quality. Since every diamond is unique, a certificate differs from an appraisal for the former provides detailed characteristics of the diamonds while the latter only tells the price.


Currently there are quite a number of authentication organizations in the market providing diamond authentication and certification services. Customers may find it confusing at times since the standards of these organizations could vary considerably. Among them, HRD, GIA, IGI, EGL and AGS are the most authoritative for these reputable organizations follow the strictest standards in diamond authentication. They are therefore highly recommended by Belgium Diamond House for our customers’ best benefits.

Jewellery Cleaning

To grasp the techniques for cleaning diamonds, learning its fundamental composition comes first. Diamonds are natural grease attractors and could be separated from other stones and dirt by passing mined material over a grease belt. This characteristic makes them easily coated with grease when come into contact with any greasy substance including natural skin oils, soap and makeup.

The simplest way to clean a diamond is to soak and wash it in warm sudsy water using a mild liquid detergent, followed by drying it with a soft, lint-free cloth. Ethyl alcohol, ammonia solutions and jewellery cleaning solutions may also be used for cleaning and soaking diamond jewellery.

Alcohol has the advantage of evaporating quickly and not leaving water spots. Ammonia is not only good for cleaning unfilled diamonds; it is also good for brightening metals such as yellow gold. Alcohol and ammonia may damage other types of stones such as fracture-filled diamonds, however, and therefore it is always advisable to consult your jewellers before using these solutions for jewellery cleaning.

Diamond surface would be dulled by chlorine solutions or chlorinated pool water. Beware of this when choosing cleaning products for your diamonds, and diamond jewellery should not be worn while swimming.

If the dirt on the diamonds has caked and cannot be washed off with a cloth after soaking, try using a toothbrush or unwaxed dental floss to remove it. Jewellry with encrusted dirt should be cleaned professionally with ultrasonic cleaning machines equipped in jewellry shops, but they should not be used for flawed diamonds or gemstones.

Lengthy cleaning procedures can be avoided by cleaning jewellry on a regular basis. For jewellry worn daily, cleaning procedures should be carried out at lease once a week.

Jewellery Storage

Diamond jewelry should be stored individually in jewelry boxes.

In addition, they could be wrapped separately in soft material and placed individually in pouches to prevent the pieces from scratching each other.