Andradite in Andradite
An iridescent Japanese andradite contained an iridescent inclusion of andradite, creating an arresting optical phenomenon.
Unusual Growth Zoning in Beryl
A striking aquamarine specimen showed a strongly saturated secondary growth layer.
Growth Blockages in Cat’s-Eye Beryllonite
A rough colorless beryllonite showed an unusually sharp separation between two regions, caused by minute inclusions deposited during growth that prevented growth of the host mineral.
Mobile Fluorite in Quartz
A violet-colored fluorite crystal inclusion in quartz was free to move within its octahedral void.
Etch Marks, Negative Crystals, and Etch Tubes in Spinel from Madagascar
A spinel from Madagascar, mixed in with a parcel of blue sapphire, exhibited an array of internal features.
Sphalerite in Topaz
The first documented example of sphalerite as a crystal inclusion in colorless topaz.
The blue cap termination from a tourmaline crystal was preserved and polished, yielding a unique designer gem.
Iridescent Inclusion in Tanzanite
A tanzanite displayed crystallographically aligned, vividly iridescent colors resulting from fine separations along the stone’s cleavage planes.
Quarterly Crystal: Quartz with Axinite
The first visual record of axinite inclusions in quartz published in the gemological literature.