Numerous needle-like inclusions exhibit vibrant interference colors in a suite of pallasitic peridot from the Jepara meteorite.

Orange crystal inclusion identified as the rare mineral triplite in a beryl from Pakistan.

Application of slight pressure perpendicular to the twinning planes reveals the unusual property of this synthetic gem.

A phenomenon resembling play-of-color was seen in a 4.13 ct unheated sapphire recently examined by the author.

Diamond inclusions are relatively common guests in diamond crystals.