In the entire diamond family, true black diamonds are also very rare. Diamonds with a large amount of black inclusions are generally considered low-quality diamonds and can only be used for industrial purposes. De Griscono Spirit Diamond is a rare gem-level black diamond in the world, and it is also the largest cut black diamond [...]
Kategorie Archiv: Schmucknachrichten
Amsterdam Diamond (Amsterdam Diamond), produced in South Africa, is also a famous black diamond. The rough diamond weighs 55.85ct, is dark black and opaque, so it is also the same under strong light, but this diamond has a very strong luster. The diamond was cut and polished by Amsterdam Drucker & Sons. From October 1972 [...]
(3) Cullinan No. 3: It is pear-shaped and weighs 94.40ct. It was inlaid on the top of Queen Mary's crown. (4) Cullinan IV: It is in the shape of a long-angled ladder and weighs 63.70ct. It was inlaid on the circular edge of Queen Mary's crown. The Cullinan No. 3 diamond is now set as [...]
The naked eye identification of rough diamonds should start from the following aspects. (1) Observe the gloss Since diamonds have a typical diamond luster, which is an important feature that distinguishes other colorless and transparent minerals (or materials), diamonds can be distinguished from other imitations by using their luster characteristics. When observing the gloss of [...]
The unique properties of diamond make it leave some cutting characteristics during processing, these characteristics are not possessed by diamond imitations, so it is possible to identify diamonds and imitations. 1. Facets, edges and corners The high hardness of the diamond determines that the diamond has a flat surface, straight edges, and sharp corners, während [...]
In 1970, Tel Aviv war bereits eines der größten Diamantenschleifzentren der Welt. Von Anfang an lag der Schwerpunkt auf dem Schleifen kleiner Diamanten, Israel hat sich in den 1980er Jahren zu einem bedeutenden Schleifer für große und ausgefallene Diamanten entwickelt. Die Diamantverarbeitungsfabrik in Israel gilt als Modell der Diamantentechnologie auf höchstem Niveau [...]
Antwerp has dominated the gem trading in Europe since the Middle Ages. Im 15. Jahrhundert, it has become the center of diamond cutting and trading. In the 20th century, it became the center of cutting and grinding large diamonds. Heute, it has undoubtedly become the world's most rough and cut diamonds. Trading hub for [...]
The object of color grading is Cape series diamonds, which are graded from colorless to light yellow according to color density. Colorless to light yellow with continuous color changes are artificially defined as a series of boundaries. These boundaries are also color levels, which represent a certain color density range. The higher the color level, [...]
Gemology nowadays originated in the eighteenth century AD. Davor, humans in ancient times had known to decorate themselves with animal bones, Muscheln, Federn, beautiful stones and other objects. With the development of history, different jewelry cultures have gradually developed. What can be called a gem? Einfach gesagt, all kinds of materials that can be [...]
Die geologischen Bedingungen der Edelsteinbildung sind unterschiedlich, und das Verbreitungsgebiet von Edelsteinen hängt hauptsächlich von den Eigenschaften der von den Edelsteinen gebildeten Gesteinsmasse ab. Zum Beispiel, Diamanten entstehen in Kimberlit, aber nicht alle Kimberlite produzieren Diamanten. Es hängt immer noch davon ab, ob das Gebiet ausreichende Bedingungen für das Wachstum von Diamanten bietet; Und [...]