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Fancy brownish greenish yellow diamond with octahedral-shaped inclusion.
Graphite Inclusions Forming Octahedral Outline in Diamond

An inclusion outlined by minute graphite crystals within a diamond create an octahedral shape.

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Diamond with Coesite Inclusions
Coesite Inclusions with Filaments in Diamond

Inclusions with unusual formation are found in a treated Fancy Vivid yellow diamond.

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0.34 ct CVD synthetic
CVD Synthetic Diamond with Unusual Inclusions

Examination of a CVD synthetic diamond with an unusual pattern of growth dislocations that resemble natural inclusions.

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Dark pink-purple spinel
Spinel Inclusion in Spinel

Examination of a pink-purple spinel revealed what appeared to be a spinel crystal inclusion.

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Yellow Diamond
Xenotime Inclusion in Yellow Diamond

Presents what is believed to be the first report of a xenotime inclusion in gem-quality diamond.

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Confusing, Triangular Inclusions in an Art Deco-Style Pin
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.

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Stellate zircon inclusions in vivid purple-pink morganite

Zircon clusters and other inclusions help to create an unusual vivid purple-pink morganite specimen.

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Unusual Curved Colour Zoning In Emerald

A report on a 1.17 ct emerald obtained in Kabul, Afghanistan for GIA's permanent reference collection

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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.

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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.

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