Diamond 相關
廣告精選鑽石、寶石、珍珠，來款訂造首飾，歡迎親臨半島酒店商場選購。 擁有20多年珠寶設計和製作的經驗，廣受香港及外國旅客歡迎，信譽良好，實力非凡。
搜尋結果
2 天前 · 不过，最近的技术发展已经能让人们制造出 10 克拉以上的钻石刻面无色晶体（15 Carat HPHT Synthetic Diamond（《15 克拉 HPHT 合成钻石》），实验室注意事项，《宝石与宝石学》(Gems & Gemology)，2018 年夏季刊，第 54 卷，第 2 期）。
2 天前 · Largest CVD Laboratory-Grown Diamond Submitted to GIA (英语) Progress in creating laboratory-grown CVD diamonds allows for larger sizes, including the largest yet seen at the Carlsbad lab. Garrett McElhenny and Sally Eaton-Magaña 四月 5, 2021
2024年5月21日 · Diamond is recognized as the only material sampling the very deep mantle to depths exceeding 800 km, as shown in figures 25 and 26. Diamond is less useful at revealing deep carbon flux (the amount of carbon in motion) because it can provide only a small
2024年5月19日 · A Tradition Of Science and Education. Established in 1931, the Gemological Institute of America (GIA) is the world’s foremost authority on diamonds, colored stones, and pearls. A public benefit, nonprofit institute, GIA is the leading source of knowledge, standards, and education in gems and jewelry.
2024年5月18日 · 2005 年，GIA 为未改良式圆形明亮式切工钻石推出了切工分级系统。. “未改良式圆形明亮式”适用于按照现代切工标准由 58 个刻面规则排列而成的对称圆形切工钻石。. 该系统是多年研究的结晶，其中包括各种群体（包括贸易专业人士和消费者）偏好测试的结果 ...
1 天前 · While mobile diamond inclusions in diamond are always remarkable (see the Lab Note on the “Matryoshka” diamond in this issue), this example is the only one the authors have observed of a mobile green diamond inclusion trapped in a colorless diamond.
1 天前 · Gemology Learn the secrets of diamonds, emeralds, sapphires and rubies. The world of gemstones beckons. Gems are cherished around the world, and there are always opportunities for trained gemologists. Buying and selling diamonds in Manhattan’s Diamond District. Negotiating deals with jewelry executives in Hong Kong.
