Guinness Emerald Crystal, weighing 1759ct, is produced in the Coscuez mining area in Colombia. It is also one of the largest high-quality emerald crystals found in the world. It has created the world’s largest high-quality gem-level emerald Green Guinness World Records. The length of the crystal is 2-2.5 times the diameter, the color is bright […]
Autorské archivy: Kingjy
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 […]
Antwerp has dominated the gem trading in Europe since the Middle Ages. V 15. stol, it has become the center of diamond cutting and trading. In the 20th century, it became the center of cutting and grinding large diamonds. Dnes, it has undoubtedly become the world’s most rough and cut diamonds. Trading hub for […]
Předmětem třídění barev jsou diamanty Cape Series, které jsou odstupňovány z bezbarvé po světle žlutou podle hustoty barev. Bezbarvá až světlá žlutá s nepřetržitými změnami barev je uměle definována jako řada hranic. Tyto hranice jsou také úrovně barev, které představují určitý rozsah hustoty barev. Čím vyšší je úroveň barev, […]