资讯

珍珠生日石的意义和历史 这一迷人的六月生日石产自世界各地的海洋、湖泊和河流。这是永不过时的衣柜必备品,深受所有年龄阶段的女性热爱。珍珠的来源让我们的祖先着迷。中东地区的古人认为珍珠是从天堂滴落的眼泪。中国的传说宣称六月生日石取自龙的大脑。克里斯多弗·哥伦布(Christopher ...
Emerald’s lush green has soothed souls and excited imaginations since antiquity.
Synthetic moissanite is much closer to diamond in overall appearance and heft than any previous diamond imitation; this article reports on how to identify and characterize it.
Diamond is the only gem made of a single element: It is typically about 99.95 percent carbon. The other 0.05 percent can include one or more trace elements, which are atoms that aren’t part of the ...
Sharon Ament, director of the Museum of London, explains the Cheapside Hoard’s unique significance. She speaks of London’s importance as a nexus of trade between the Old World and the New World, and ...
Amethyst is the purple variety of the quartz mineral species and the gem most commonly associated with the color purple.
Ruby is an incredibly durable gemstone if there are no treatment-related durability concerns. - Courtesy Jan Goodman Co. Hardness and toughness Gem and mineral hardness is measured on the Mohs scale.
Stability Alexandrite is stable under normal wearing conditions, which means it’s resistant to the effects of heat, light, and common chemicals. Cleaning Warm, soapy water is always safe for cleaning ...
Changes resulting from heat treatment are stable and undetectable. Gems with abundant liquid inclusions can’t withstand heat treatment. Color changes due to irradiation can fade with exposure to heat ...
The history of Baja California has been closely tied to the exploitation of pearls since the 16th century.
In 2009, GIA bestowed its highest honor, the Richard T. Liddicoat Award for Distinguished Achievement, on longtime chief research gemologist John I. Koivula. The award was based on his contributions ...
Emerald is the green to greenish blue variety of beryl, a mineral species that also includes aquamarine as well as beryls in other colors.