Niessing diamonds

Diamonds exhale eternity

Each stone is unique

A fascinating mineral from the depths of the earth, formed over millions of years under extremely high pressure and temperature. “Diamond”, in the original sense of the word, means “the unbreakable”.

Each diamond breathes eternity, each is a wonderful symbol of love. For thousands of years, diamonds have been working their spell on us. In terms of chemistry, they are “merely” carbon, but they have very remarkable features:

Diamond is an extremely hard mineral, and it is very precious. No other substance refracts white light as a diamond does, reflecting it in all colors. Each stone has its very own fire. Nature knows no repetition.

A diamond and its sparkle

Some influence can be exerted on diamonds: Rough diamonds are cut into shape to bring out their brilliance. In a brilliant-cut diamond, a round outline and 57 facets form a perfect surface for reflection, creating magical plays of light. There are innumerable diamond cuts, and the classic among them is the brilliant cut.

White or naturally colored?

Each diamond has a character of its own. And that is not only true for white diamonds. The smallest of mineral traces open up an entire cosmos of optical phenomena: From yellow to warm brownish hues, to bluish or pink—and all of it is natural. Not even under a magnifying glass will you find any inclusions in flawless diamonds. But then, don’t small irregularities make life interesting? Tiny variances can add spirit to the fire of a cut diamond.

We go for quality

What you can expect from us

Niessing diamonds are top quality. Independently of its certificate, each stone is specifically examined by our Niessing experts. Only the very best diamonds are suited for Niessing’s tension rings, because they are the only ones capable of withstanding the high degree of tension in the ring.

Your Niessing jeweler will help you select the right diamond for your piece of jewelry. The “four Cs” cut, color, clarity, and carat—as well as the fifth characteristic confidence—offer a good orientation.


Diamond is the hardest known substance, and also one of the most fascinating minerals. The name says it all: “adamas” is ancient Greek and means “the unbreakable”. A symbol for purity, clarity, and courage, it has been the most highly valued gemstone for many centuries. Diamonds are assessed according to the 4 Cs cut, color, clarity, and carat. Niessing vouches for the quality of the diamonds used.


The cut defines proportions, symmetry, and polish. Niessing prefers the brilliant cut: round top view, 32 crown and upper girdle facets, a table, 24 pavilion and lower girdle facets. Due to the cut and the light refraction, this perfect gemstone sparkles in all colors of the rainbow. The quality of the cut is graded as excellent, very good, good, or fair. Niessing uses only good to excellent cuts.


The intensity of the hue. White or colorless diamonds are very rare. Diamond experts distinguish the following hues: Exceptional white+ (D), Exceptional white (E), Rare white+ (F), Rare white (G), White (H), Slightly tinted white+ (I), Slightly tinted white (J), Tinted white+ (K), Tinted white (L), and Tinted color (M-Z) (color grades according to IDC). Naturally colored yellow, brownish, red, green, and blue diamonds are also extremely rare.


Flawless or with inclusions? Diamonds are natural products and as such frequently have inclusions of minerals, cracks, and growth marks. Internally Flawless (IF) category diamonds have no inclusions visible under 10x magnification. In the Very, Very Slightly Inclusion (VVS) category, inclusions are difficult to see under magnification, Very Small Inclusions (VS) and Small Inclusions (SI) are noticeable under magnification, while the inclusions in P1-P3 (first to third piqué) diamonds are visible to the naked eye.


The unit of mass. One carat (ct) corresponds to 0.2 grams. The term stems from the original unit of weight, the carob seed, or kerátion, in Greek. The weight of very small diamonds can also be measured in points: 1 point = 0.01 ct.


Your confidence in Niessing. We declare that our diamonds are subject to the ‘System of warranties’ of the ‘Kimberley Certificate’, as guaranteed to us by our suppliers. Each diamond is specifically examined by our Niessing diamond experts.

Diamond Tracing:

What is the origin of my diamond?

This is only possible for Canadian diamonds! Here you can trace the origin of your Canadian Niessing diamond back to the mine and the rough crystal.

Please enter the certificate number here:

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