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 […]
Author Archives: Kingjy
Опал сонымен қатар ұзақ тарихы бар асыл тастар және минералогиядағы қымбат опал деп аталады. -Ден 200-100 Б?, Адамдар асыл тастар ретінде пайдалана бастады. Ежелгі Римде, Ormals тек белгілі емес еді, Бірақ өте құнды. Пинты, Ежелгі Рим натуралисті, Бір кездері Opal туралы өте керемет сипаттама берді: “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) Кульниан жоқ. 3: Бұл алмұрт тәрізді және салмағы 94.40CT. Ол патшайымның Мәриямның тәжінің жоғарғы жағында. (4) Cullinan IV: Бұл ұзын бұрышты баспалдақ пен салмағы 63.70CT түрінде. Мәрияш патшайымның тәжінің айналмалы шетіне кірді. Калланы жоқ. 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 […]
-Да 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. In the 15th century, it has become the center of diamond cutting and trading. In the 20th century, it became the center of cutting and grinding large diamonds. Бүгін, it has undoubtedly become the world’s most rough and cut diamonds. Trading hub for […]
The object of color grading is Cape series diamonds, which are graded from colorless to light yellow according to color density. Colorless to light yellow with continuous color changes are artificially defined as a series of boundaries. These boundaries are also color levels, which represent a certain color density range. The higher the color level, […]