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 […]
Kategori Arkiver: Smykker nyheder
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, mens […]
I 1970, Tel Aviv was already one of the world’s major diamond cutting centers. From its initial focus on cutting small diamonds, Israel has transformed into a major cutter of large and fancy diamonds in the 1980s. The diamond processing factory in Israel is known as the model of the highest level of diamond technology […]
Antwerpen har domineret perlehandelen i Europa siden middelalderen. I det 15. århundrede, det er blevet centrum for diamantskæring og handel. I det 20. århundrede, det blev centrum for at skære og slibe store diamanter. I dag, det er uden tvivl blevet verdens mest uslebne og slebne diamanter. Trading hub for […]
Genstanden for farveklassificering er Cape-seriens diamanter, som er gradueret fra farveløs til lys gul efter farvetæthed. Farveløs til lysegul med kontinuerlige farveændringer er kunstigt defineret som en række grænser. Disse grænser er også farveniveauer, som repræsenterer et bestemt farvetæthedsområde. Jo højere farveniveau, […]
Gemologi opstod i dag i det attende århundrede e.Kr. Før det, mennesker i oldtiden havde vidst at pynte sig med dyreknogler, skaller, fjer, smukke sten og andre genstande. Med historiens udvikling, forskellige smykkekulturer har efterhånden udviklet sig. Hvad man kan kalde en perle? Simpelthen sagt, all kinds of materials that can be […]
The geological conditions of gem formation are different, and the distribution area of gems mainly depends on the properties of the rock mass formed by the gems. For eksempel, diamonds are formed in Kimberlite, but not all Kimberlites produce diamonds. It still depends on whether the area has sufficient conditions for diamonds to grow; og […]