Article Search Results

Show Filters
Showing 13 results for "*"
Emerald crystals from Colombia, Afghanistan, and Zambia
Photoluminescence Spectra of Emeralds from Colombia, Afghanistan, and Zambia

Compares PL spectroscopy data of 48 emerald samples from three countries to evaluate the usefulness of the technique in geographic origin determination.

Read More

Richard Nacken in 1907
Synthetic Emeralds Grown by Richard Nacken in the Mid-1920s: Properties, Growth Technique, and Historical Account

Describes the chemical, morphological, and microscopic properties of the first gem-quality synthetic emeralds ever produced, offering a historical perspective on their development.

Read More

Tucson: A Showcase of Colored Gemstone Innovation

An overview of the Spring 2016 Gems & Gemology content.

Read More

Garnets, Sapphires, Opals, and Tarnish on High-Purity Gold

An overview of the Winter 2015 Gems & Gemology content.

Read More

Colombian Trapiche Emeralds: Recent Advances in Understanding Their Formation

Proposes a model for trapiche emerald formation based on petrographic, spectroscopic, and chemical examination.

Read More

Duncan Pay
Trapiche and More...

Colombia’s unique trapiche emeralds exert a fascination for many gemologists.

Read More

On the Identification of Various Emerald Filling Substances

Criteria for distinguishing emerald filling substances were investigated.

Read More

Emeralds from the Ural Mountains, USSR
Emeralds from the Ural Mountains, USSR

Emeralds are again being mined in the historic district of the Ural Mountains. Physical, chemical, spectroscopic, and microscopic characteristics of stones from the recent production are presented and compared with data on older samples as well as those reported in the literature.

Read More

Emeralds of the Panjshir Valley, Afghanistan
Emeralds of the Panjshir Valley, Afghanistan

With the withdrawal of Soviet troops from Afghanistan, villagers in the Panjshir Valley are turning their attention to the emerald riches of the nearby Hindu Kush Mountains.

Read More

The Chemical Distinction of Natural from Synthetic Emeralds
The Chemical Distinction of Natural from Synthetic Emeralds

Natural and synthetic emeralds are studied to identify the chemical differences between them.

Read More