This large marble-hosted occurrence in the Pamir Mountains is a potentially productive source of corundum, including ruby with a bright red color reminiscent of “pigeon’s blood” Burmese rubies.

Examines a form of asterism comprising two six-rayed stars, one white and one that exhibits the stone’s bodycolor. Firsthand accounts and a survey of patent documents reveal that diffusion has been used to create or enhance this optical phenomenon in synthetic and possibly natural corundum since the 1950s.

A guide to capturing gem inclusion scenes using practical equipment and techniques and the appropriate image-refining software.

《纽约州矿物收藏指南》书评。

Review of I Love Those Earrings: A Popular History from Ancient to Modern, by Jane Merrill with Chris Filstrup.

评论 S.K. Samuels（S.K. 塞缪尔）的 Imperial Jade of Burma and Mutton-Fat Jade of India: Mining, Trade, and Use from Antiquity to the Present（《缅甸帝王玉和印度羊脂玉：从古至今的开采、贸易及使用》）。

Review of Collector’s Guide to the Zeolite Group, by Robert J. Lauf.

An overview of recently expanded sapphire production at the Gem Mountain mine near Philipsburg, Montana.

An insider’s view of the stunning world of inclusions.

An update on the nephrite jade market from the 2015 GJX show.

The New York lab examines three pink CVD synthetic diamonds which have received LPHT annealing treatment.

Diffusion treatment is used to induce color and asterism in a colorless synthetic sapphire.