Examines correlations between surface microstructures and the orange peel effect in Russian white nephrite, proposing a formation model and revealing distinctive microfeatures specific to the material.

A euhedral prismatic pargasite crystal is identified in pink spinel.

Play-of-color pattern in Ethiopian opal is reminiscent of a turtle’s shell.

A non-nacreous pearl with a netted surface resembles the exterior of a melon.

A diamond feather and its reflection resemble an unidentified flying object.

Examination of a 1.34 ct ruby reveals a unique inclusion formed during heat treatment.

A diamond octahedron from South Africa hosts a rare yellow-orange almandine-pyrope garnet crystal.

Investigates the morphological changes of macle diamonds during the growth process by exploring their three-dimensional internal zonal structure.

Natural pearl cores are used to simulate the appearance of natural pearl growth in two assembled pearls mounted in a pair of earrings.

Clusters of micro-inclusions form starburst-patterned clouds in a 2.50 ct Faint yellow-green round brilliant diamond.

The Carlsbad lab receives a laboratory-grown colorless sapphire with weblike fractures containing concentrations of dye.

A 63.17 ct dumortierite rough crystal is examined in the Bangkok laboratory.