A spinel from Madagascar, mixed in with a parcel of blue sapphire, exhibited an array of internal features.

Uses gamma-ray spectrometry to directly measure internal radioactivity in green nephrite from deposits in Poland, Russia, Canada, and New Zealand.

The author acquired an alluvial rough diamond from Guyana showing unique surficial features that do not appear to have been documented elsewhere.

The surprising inner world of inorganic inclusions in amber is explored through the use of polarized light and microscopic techniques.

Presents a simplified but comprehensive classification of gem tourmaline species based on quantitative measurement of six common major elements.

The author examined a 0.56 ct Fancy grayish bluish green diamond with prominent green radiation stains.

A rare spinel, featuring a Star of David pattern and multiphase inclusions, is examined in Bangkok.

Topaz is an important gemstone that occurs in various colors.

Examination of a 0.40 ct near-colorless round brilliant diamond with a large inclusion resembling a dumbbell

Located about 60 miles east of San Diego, a new emerald deposit has been discovered in the Julian Mining District.

Bill Larson of Pala International reports a very strong AGTA Tucson show.

A new find of rose quartz from Madagascar contained some unusual inclusions.

Two pearls from Bahrain containing minute shells are examined at GIA’s Mumbai laboratory.

A relatively new production of red corundum, reportedly from Bangkok, has been offered for sale in recent years.

160 ct yellow sapphire rough from Sri Lanka.

The author recently examined a 3.58 ct yellowish green yttrium aluminum garnet, a manufactured product known in the trade as “YAG,” that contained numerous large flux-filled fractures.

GIA’s Hong Kong laboratory looks at a new radio-frequency identification (RFID) technology for tracking cultured pearls.