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, [...]
Arhivele de categorii: Știri despre bijuterii
Cristal de smarald Guinness, cântărind 1759 ct, este produs în zona minieră Coscuez din Columbia. Este, de asemenea, unul dintre cele mai mari cristale de smarald de înaltă calitate găsite în lume. A creat cel mai mare record mondial Guinness World Records de smarald verde la nivel de pietre prețioase de înaltă calitate. Lungimea cristalului este 2-2.5 ori diametrul, culoarea este strălucitoare [...]
Opal is also a gemstone with a long history and is called precious opal in mineralogy. Din 200-100 î.Hr, people began to use opals as gems. În Roma antică, opals were not only well-known, but also extremely valuable. Pliny, the ancient Roman naturalist, once gave a very wonderful description of Opal: "Opal has a ruby-like [...]
În întreaga familie de diamante, diamantele negre adevărate sunt, de asemenea, foarte rare. Diamantele cu o cantitate mare de incluziuni negre sunt, în general, considerate diamante de calitate scăzută și pot fi utilizate numai în scopuri industriale. De Griscono Spirit Diamond este un diamant negru rar la nivel de bijuterie din lume, and it is also the largest cut black diamond [...]
Amsterdam Diamond (Amsterdam Diamond), produs în Africa de Sud, este, de asemenea, un celebru diamant negru. Diamantul brut cântărește 55,85 ct, este negru închis și opac, deci este la fel și sub lumină puternică, dar acest diamant are un luciu foarte puternic. Diamantul a fost tăiat și lustruit de Amsterdam Drucker & Fiii. Din octombrie 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, în timp ce [...]
În 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. În secolul al XV-lea, it has become the center of diamond cutting and trading. In the 20th century, it became the center of cutting and grinding large diamonds. Astăzi, it has undoubtedly become the world's most rough and cut diamonds. Trading hub for [...]