Coesite Inclusions with Filaments in Diamond
Inclusions with unusual formation are found in a treated Fancy Vivid yellow diamond.
Graphite Inclusions Forming Octahedral Outline in Diamond
An inclusion outlined by minute graphite crystals within a diamond create an octahedral shape.
Spinel Inclusion in Spinel
Examination of a pink-purple spinel revealed what appeared to be a spinel crystal inclusion.
Xenotime Inclusion in Yellow Diamond
Presents what is believed to be the first report of a xenotime inclusion in gem-quality diamond.
CVD Synthetic Diamond with Unusual Inclusions
Examination of a CVD synthetic diamond with an unusual pattern of growth dislocations that resemble natural inclusions.
Stellate zircon inclusions in vivid purple-pink morganite
Zircon clusters and other inclusions help to create an unusual vivid purple-pink morganite specimen.
Diamond with High Concentration of Nickel
Analysis of Fancy Light greenish yellow diamond leads to detection of nickel, as well as an inclusion that gives a colour-change effect.
Fish-Like Inclusion Found in Fancy Yellow "Cape" Diamond
A recent lab examination at GIA New York revealed an inclusion in a rectangular Fancy Yellow called "pareidolia", which means it was a resemblance of the scales and form of a fish.
Unusual Curved Colour Zoning In Emerald
A report on a 1.17 ct emerald obtained in Kabul, Afghanistan for GIA's permanent reference collection
Spring 1991 G&G Lab Notes
This section, from the Spring 1991 issue of Gems & Gemmology, is a compilation of interesting finds from GIA’s laboratories.