Böhmite in Corundum
Rubies from Mozambique, which were examined at the Lotus Gemology lab in Bangkok, proved to be infilled with böhmite, a secondary mineral in corundum.
Fluorophlogopite in Burmese Spinel
Lotus Gemology in Bangkok received a large parcel of dark red spinels for identification.
A Sapphire with a Negative Crystal Containing a Mobile Graphite Daughter Crystal
Mineral and fluid phases within negative crystals in metamorphic sapphires provide us with general information on the sapphire and the trapped fluid itself.
Windmills in Rare Mineral Sphalerite
Whimsical windmill-like inclusions are found in a high-quality orange specimen of the rare mineral sphalerite.
Unusually Shaped Rutile Crystal Inclusions in Russian Emerald
Needle-like inclusions in an emerald crystal from the Mariinsky Priisk mine may be a new indicator of Russian origin.
Rare Inclusion of Chabazite in a Precious Opal from Ethiopia
An inclusion rarely seen in a cut stone appears in a gray Ethiopian opal.
Trapiche-Like Pattern in an Emerald from Pakistan
Brightfield illumination reveals a distinctive growth pattern similar to trapiche in a beautiful emerald from Swat Valley.