Chalcedonies include many types of cryptocrystalline quartz gems and feature a number of different colors. Geologists can tell a chalcedony from the arrangement and structure of its crystals.

This becomes apparent when looking through all the modern English translations, which collectively offer over 40 different identities for the 12 gems on the breastplate of Aaron alone. Gems mentioned ...

Photo: Tino Hammid. Courtesy: Pamela Welborn The jewelry industry uses the term “simulant” to refer to materials, such as CZ, that look like another gem and are used as its substitute but have very ...

You can find topaz, opals, amethysts, and more — there are over 40 different gemstones possible in every scoop. The larger the container, the more jewels you'll uncover. You can sift your own ...

New sources can produce material that is very similar to gems from classical sources or with a slightly different, but just as beautiful, appearance. Blue sapphires typically have some inclusions, but ...