Diamond with Unusual Laser Manufacturing Remnant
An unusual laser manufacturing remnant, possibly once used to guide a gem cutter, was left behind in a clock-like shape.
Turquoise with Fingerprint Pattern
A fingerprint pattern, possibly left by human skin oils during the assembly process, is observed in natural turquoise beads.
Large Pinkish Brown CVD Synthetic Diamond
Report on the analysis of an unusually large CVD synthetic diamond, unique in that its Faint to Light pinkish brown color doesn’t appear to be the result of post-growth treatment.
Green Sapphire Filled with Glass
Analysis reveals blue lead glass filling in a sapphire that has an overall green bodycolor as a result of the filling’s combination with natural yellow color.
A Useful Technique to Confirm the Hydrophane Nature of Opal
Observing a water drop’s interaction with opal, as well as refractive index, can confirm a specimen’s hydrophane nature with less risk of breakage than total immersion.
Purple Jadeite Rock
Detected mineral components—jadeite and quartz, with reddish orange portions of cinnabar—shed light on a purple bead’s possible origin.
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 color-change effect.
Enormous South Sea Cultured Pearl Filled with Cultured Pearls
An unusually large cultured pearl was filled with multiple cultured pearls, perhaps after the emergence of an original single-bead nucleus.
Imitation Rainbow Moonstone Assemblage
Examination of an imitation rainbow moonstone assemblage containing plastic-coated gypsum.