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 [...]
Kategoriya arxivi: Zargarlik buyumlari yangiliklari
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, vaqt [...]
Ichida 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 [...]
Antverpen O'rta asrlardan beri Evropada qimmatbaho toshlar savdosida hukmronlik qilgan. 15-asrda, olmos kesish va savdo markaziga aylandi. 20-asrda, yirik olmoslarni kesish va maydalash markaziga aylandi. Bugun, u shubhasiz dunyodagi eng qo'pol va kesilgan olmosga aylandi. Trading hub for [...]
Ranglarni tasniflash ob'ekti Cape seriyali olmosdir, rang zichligiga ko'ra rangsizdan och sariq ranggacha bo'linadi. Rangsizdan och sariq ranggacha doimiy rang o'zgarishi bilan sun'iy ravishda bir qator chegaralar sifatida aniqlanadi. Bu chegaralar ham rang darajalaridir, ma'lum bir rang zichligi oralig'ini ifodalaydi. Rang darajasi qanchalik baland, [...]
Gemologiya bugungi kunda milodiy XVIII asrda paydo bo'lgan. Undan oldin, Qadim zamonlarda odamlar o'zlarini hayvonlarning suyaklari bilan bezashni bilishgan, chig'anoqlar, patlar, chiroyli toshlar va boshqa narsalar. Tarixning rivojlanishi bilan, turli zargarlik madaniyatlari asta-sekin rivojlandi. Nimani marvarid deb atash mumkin? Shunchaki kiying, all kinds of materials that can be [...]
The geological conditions of gem formation are different, and the distribution area of gems mainly depends on the properties of the rock mass formed by the gems. Masalan, diamonds are formed in Kimberlite, but not all Kimberlites produce diamonds. It still depends on whether the area has sufficient conditions for diamonds to grow; va [...]