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A Closer Look at the Micro-World of Gems

July 31, 2015

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

Bicolor Double-Eye Tourmaline

July 31, 2015

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

Unusual Pink Sapphire Bead

July 31, 2015

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

Cat’s-Eye Phenakite

July 31, 2015

Inclusions create chatoyancy in a colorless phenakite cabochon.

Iridescent Musgravite

July 31, 2015

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

Intense Blue Diamond with Very High Boron Concentration

July 31, 2015

A natural Fancy Intense blue diamond submitted to the New York lab shows the highest boron concentration ever reported in a natural specimen.

Blue Chalcedony Partially Filled with Epoxy Resin

July 31, 2015

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

Apatite “Piñata”

July 31, 2015

A cracked apatite specimen reveals hidden treasure.

Digital Photomicrography for Gemologists

July 31, 2015

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

Dual-Color Double Stars in Ruby, Sapphire, and Quartz: Cause and Historical Account

July 31, 2015

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.

Rubies and Sapphires from Snezhnoe, Tajikistan

July 31, 2015

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.

Introduction to the Micro-World of Gems

July 31, 2015

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

图书：Imperial Jade of Burma and Mutton-Fat Jade of India（《缅甸帝王玉和印度羊脂玉》） (英语)

July 31, 2015

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》）。