A New Discovery of Emeralds from Ethiopia
A report on a new Ethiopian source of high-quality emerald.
埃塞俄比亚蛋白石中的闪光和火焰 (英语)
Chatoyancy, rarely seen in play-of-color opal, is observed in Ethiopian material.
Negative Crystals in Sapphires
Sapphires from Baw Mar host multiphase inclusions in appealing patterns.
An Inside Look at the 2017 Tucson Shows
An overview of the trends reported at the 2017 Tucson gem shows.
New Designs from Paula Crevoshay
World-renowned jewelry artist Paula Crevoshay displays some of her newest pieces at the Tucson gem shows.
HPHT Synthetic Diamond Melee Without Si or Ni Defects
Quality assurance testing in the Bangkok lab reveals HPHT synthetic melee in larger sizes.
Quarterly Crystal:Mystery in Topaz
A topaz hosting a group of inclusions is examined in the Carlsbad lab.
Imitation Cat’s-Eye Pen “Pearls”
Imitation pearls show kaleidoscopic colors with illumination.
Tourmaline and Sapphire from Nigeria
An update on Nigerian colored stone production is obtained at the Tucson gem shows.