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, [...]
أرشيف الفئة: أخبار المجوهرات
غينيس الزمرد كريستال, وزنها 1759 قيراط, يتم إنتاجه في منطقة التعدين كوسكويز في كولومبيا. كما أنها واحدة من أكبر بلورات الزمرد عالية الجودة الموجودة في العالم. لقد أنشأت أكبر حجر زمرد أخضر عالي الجودة في العالم في موسوعة غينيس للأرقام القياسية. يبلغ طول البلورة 2-2.5 أضعاف القطر, اللون مشرق [...]
Opal is also a gemstone with a long history and is called precious opal in mineralogy. من 200-100 قبل الميلاد, people began to use opals as gems. في روما القديمة, opals were not only well-known, but also extremely valuable. بليني, 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 [...]
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, بينما [...]
في 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. في القرن الخامس عشر, it has become the center of diamond cutting and trading. In the 20th century, it became the center of cutting and grinding large diamonds. اليوم, it has undoubtedly become the world's most rough and cut diamonds. Trading hub for [...]