Buying & selling diamonds

Family firm in the diamond sector located in Antwerp

We are the Janssens family. Our expertise: buying, selling and taxation of diamonds and jewellery.

Ja-Diam is an established diamond expert firm, specialised in selling, buying and evaluating diamonds, including diamond jewellery.

As an established family firm for more than 3 generations in the diamonds sector in Antwerp, we are in the perfect position to offer you an extensive collection of brilliants and fancy cut diamonds in different sizes, weights, shapes and cuts.

If you are looking for diamond-dealing experience that spans three generations, look no further. Ja-Diam can offer you its expert advice on buying and selling diamonds.

Ja-Diam’s expertise and certified evaluation process is your answer for overcoming the uncertainty and confusion of selling your diamonds and diamond jewellery.

Interested in the value of your diamond? We assess diamonds and jewellery for free.

Evaluate your diamond

Interested in the value of your diamond? We assess diamonds and jewellery for free.

Evaluate your diamond

Broad stock of brilliants and fancy cut diamonds

Information
March 6, 2018

Antwerp Diamonds

ANTWERP DIAMONDS: THE DIAMOND CITY OF THE WORLD Antwerp and diamonds are two words that are often used in one sentence. And with good reason: Today, more than 80% of…
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March 6, 2018

What does Carat mean?

Along with clarity, colour, and cut, carat is one of the “4 C's” when it comes to the evaluation of diamonds. Carat (abbreviated Ct) is a way to describe the…
Information
March 6, 2018

How does Diamond Cut Affect Value and Beauty?

Three of the “4 C's” involved in the evaluation of diamonds—carat, clarity, and colour—depend upon the natural chemical and/or structural composition of the diamond. But the fourth C, cut, involves…