Emerald is a chromium-containing emerald green beryl, usually together with diamonds, rubies and sapphires, it is listed as the four most precious gems. The ancient Roman naturalist Pliny (Gaius Cecilius Secundus, about 23-79 AD) once gave a wonderful description of the color of emeralds: “There is no gem that is more pleasing to the eye [...]
Category Archives: Jewelry News
Time: 2013-09-10 Source: Baolong.com In the 16th century, the Mexican conqueror Hernando Cortes (Hernando Cortes) brought 5 large and high-quality emeralds back to Spain, and they were carved into various shapes of crafts by the Aztecs. Such as fish, flowers, etc.; one of the emerald jewelry has a high-quality pearl on the bell tongue. These [...]
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, [...]
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 [...]
Opal is also a gemstone with a long history and is called precious opal in mineralogy. From 200-100 BC, people began to use opals as gems. In ancient Rome, 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 [...]
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, while [...]