Mysterious Iridescence in Aquamarine
A rough aquamarine crystal shows an unexpected phenomenon.
Ametrine Optical Dishes: Windows into the Effects of Crystal Structure
Optical activity is studied using a polished block of ametrine.
Quarterly Crystal: Bubble in Fluorite
Reveals an uncommon fluid inclusion in fluorite.
Zircon Cluster in Ethiopian Sapphire
The presence of these zircon clusters might help separate Ethiopian sapphire from other basalt-related sources.
Gilson Cat’s-Eye Synthetic Emerald
This Gilson synthetic emerald was of particular interest for its chatoyancy, produced by a network of primary flux inclusions.
Sillimanite in Ruby
Unusual needle-like inclusions in ruby were identified as sillimanite.
Drill Hole in Heated Pink Sapphire
An unexpected manmade feature is found in a pink sapphire from Myanmar.
Prismatic Rutile in Quartz
A rock crystal quartz displayed a large, well-formed rutile crystal inclusion under the table.
Lepidocrocite in Boulder Opal
A boulder opal contained an unusual carpet of needle-like lepidocrocite inclusions along the interface between the opal and the ironstone matrix.
Rose in Demantoid from Madagascar
This demantoid garnet was of particular interest for a large inclusion resembling a flower.