Three Occurrences of Oregon Sunstone
Chronicles a visit to the high desert of eastern Oregon to examine commercial sources of this natural copper-bearing feldspar.
The Museum of London’s Extraordinary Cheapside Hoard
The history and mysteries behind a treasure of jewels hidden during the 1600s, a window to the past being fully opened to the public for the first time since a chance discovery a century ago.
Book Review: Gold, Platinum, Palladium, Silver & Other Jewelry Metals: How to Test, Select & Care for Them
Review of Gold, Platinum, Palladium, Silver & Other Jewelry Metals: How to Test, Select & Care for Them, by Renee Newman.
Amber with Insect-Bearing Filling
Natural amber beads were found to have been filled with plastic and a variety of insects.
Cobalt-Doped Composite Sapphires: A Blessing or a Curse?
Overview and commentary on the Spring 2013 InColor article, “Cobalt-Colored Composite Sapphires.”
Study Helps Identify Nepalese Kyanite
Commentary on a 2013 German article, translated as "Sapphire-blue kyanite from Nepal."
Decades-Old Synthetic Alexandrite Sheds Light on Modern-Day Research Needs
An overview and commentary on the 2012 Journal of Gemmology article, “Flux-grown synthetic alexandrites from Creative Crystals Inc.”
On the Origin of Digit Patterns in Gem Opal
An examination of the finger-like feature mostly found in Ethiopian opal, and proposal for its formation.
Boron Carbide: A New Imitation of Black Diamond
The Gem Testing Laboratory in Jaipur identified a black diamond-like specimen as boron carbide, a ceramic material typically used in nuclear, military, and aerospace applications.
Book Review: From a Snowflake to an Iceberg: The McFerrin Collection
By Dorothy McFerrin, publ. by the McFerrin Foundation, College Station, Texas, 2013, US $125