Judging from the discovery process of emeralds in the world, it is not difficult to see that the main origin of emeralds is Colombia in South America, and many legendary emerald treasures also originated from Colombia. 1. Devon emeralds Devenshire Emerald (Devenshire Emerald), discovered in the Muzuo mining area in Colombia in the 19th century, [...]
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Guinness Emerald Crystal, hmotnost 1759 ct, se vyrábí v těžební oblasti Coscuez v Kolumbii. Je to také jeden z největších vysoce kvalitních smaragdových krystalů nalezených na světě. Vytvořila světově největší vysoce kvalitní smaragdovou zelenou Guinessovu knihu rekordů na úrovni drahokamů. Délka krystalu je 2-2.5 krát průměr, barva je jasná [...]
Opal is also a gemstone with a long history and is called precious opal in mineralogy. Z 200-100 př.n.l, people began to use opals as gems. Ve starém Římě, opals were not only well-known, but also extremely valuable. Plinius, the ancient Roman naturalist, once gave a very wonderful description of Opal: "Opal has a ruby-like [...]
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 [...]
Amsterdamský diamant (Amsterdamský diamant), vyrobené v Jižní Africe, je také slavný černý diamant. Surový diamant váží 55,85 ct, je tmavě černá a neprůhledná, tak je to stejné i pod silným světlem, ale tento diamant má velmi silný lesk. Diamant vybrousil a vyleštil Amsterdam Drucker & Synové. Od října 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 [...]
Jedinečné vlastnosti diamantu způsobují, že během zpracování zanechává nějaké řezací vlastnosti, Tyto vlastnosti nejsou posedlé napodobováním diamantu, Je tedy možné identifikovat diamanty a napodobení. 1. Aspekty, edges and corners The high hardness of the diamond determines that the diamond has a flat surface, rovné hrany, a ostré rohy, zatímco [...]
V 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 [...]
Antverpy dominovaly obchodu s drahokamy v Evropě již od středověku. V 15. stol, stalo se centrem řezání a obchodování s diamanty. Ve 20. století, stalo se centrem řezání a broušení velkých diamantů. Dnes, nepochybně se stal světově nejvíce neopracovanými a broušenými diamanty. Trading hub for [...]