Baroque pearls were ubiquitous at the Tucson 2015 gem shows.

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

The Green Dragon mine yields exceptional demantoid, including a round brilliant seen at Tucson’s GJX show.

The popularity of gem slices, particularly diamond, is on the rise, as reflected at the 2015 Tucson gem shows.

A hexagonal boundary, usually found in natural material, is observed in a synthetic star sapphire.

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

A tourmaline displaying different colors of chatoyancy on opposite sides of a double cabochon is examined.

A pink sapphire bead with drill holes revealing ruby fragments is examined.

Inclusions create chatoyancy in a colorless phenakite cabochon.

A musgravite specimen’s inclusions result in an optical phenomenon unusual for the material.

A carving identified as blue chalcedony shows evidence of epoxy resin treatment.

A cracked apatite specimen reveals hidden treasure.

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.

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.

G&G’s new column takes a closer look at the hidden wonders found in gemstones.

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》）。

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》）。

《纽约州矿物收藏指南》书评。