- Charlie Bernheiser, IGS成员
The world's best gem articles, published weekly.
Distinguishing diamonds from their lookalikes requires educated eyes. Learn what visual features to look for and the properties of many popular…
长期与皇室联系在一起， 蓝宝石 are some of the most popular (and expensive) gems in the world. GPK电子游戏平台的 蓝宝石 购买指南会帮助你…
Rare and difficult to cut, anhydrite is seldom faceted. However, this material can be carved into beautiful objects. “Angelite”,蓝灰色……
Learn how to determine a gem’s optic character with a refractometer and identify optical effects you may encounter during gem identification…
2月16日, 2022 TUCSON — After a cancellation in 2021, the Tucson Gem Show returned to Arizona from February 10-13, 2022. ,提出了…
更广为人知的是稀有夹杂物 绿宝石, parisite crystals are usually small and seldom faceted.
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Becoming a Pro Member of IGS just made good sense for my business. 这里的宝石资源非常丰富, and my profile lets potential customers know I am serious about colored gemstones. And frankly, if I get any exposure to potential customers it's a no-brainer.
The world's best online resource for gemstone appraisal
超过15年, we have assembled detailed pricing and value information for appraising over 70 different gemstones. The values in our guide come from a variety of sources including primary and secondary gemstone dealers, 珠宝商, 矿工, and wholesale suppliers of commonly traded gemstones.
Take Your Passion for 宝石 to a Whole New Level
Encyclopedia has information on over 300 gemstones, from traditional and popular jewelry standards to collector’s stones that rarely appear for sale. Each entry has photos and detailed information about the gem’s properties. Entries for jewelry stones also have price guidelines and discussions of their most important value factors.
has been synonymous with the color green since ancient times. A fine emerald is a truly breathtaking sight, and this member of the beryl family deserves its placement among the traditional “Big Four” gems along with diamond, ruby, 和蓝宝石.
For millennia, artisans have carved intricate cameos from black-and-white 缟玛瑙
. Solid black 缟玛瑙es, faceted or cabbed, are also popular jewelry stones.
Few gems have held our attention over millennia as well as 蓝宝石
. The pure blue colors and excellent durability of this gem-quality member of the corundum family make for an exceptional gemstone. 然而，并非所有的蓝宝石都是蓝色的. The September birthstone comes in every color of the rainbow (except red).
When it comes to engagement ring stones, there’s a lot to consider. 在 碳硅石
vs diamond debate, we’ll look at three main factors: beauty, durability, and price.
作为颜料有很长的使用历史吗. As a gemstone, this material is often carved but very rarely faceted. Despite its association with blood and the color red, hematite’s color can range from black and metallic gray to brownish red in thin slivers or crystals.
We’ve compiled information on average costs and sizes for different 钻石削减
和不同克拉重量的形状. Learn how the different fancy cuts compare, and the pros and cons of different 钻石削减.
is a rare material popular with collectors of unusual gems as well as those interested in its formation from a meteorite impact.
is the most common form of natural glass and occurs in many attractive varieties. 自史前时代, people have used this material to make jewelry and carvings as well as practical objects, 像刀子.