Dual-Color Double Stars in Ruby, Sapphire, and Quartz: Cause and Historical Account
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.
GIA Gem Project
Various Gems (Olivine - Rutile)
Among the collection assembled by Dr. Edward Gübelin are a number of uncommon gemstones from many worldwide localities.
Gem Paintings from Thailand
Paintings created from uncut gem fragments are seen at Tucson’s GJX show.
Wheel of Light’s Mesmerizing Optics
A closer look at the Spectrum award-winning pendant from Nature’s Geometry.
Thai-Myanmar Petrified Woods
The properties of petrified woods originating from various localities in Thailand and Myanmar are examined.
Synthetic Quartz: A Designer Inclusion Specimen
A collectable inclusion specimen is created by introducing garnets to synthetic quartz during the growth process.
African Rhodochrosite and Colombian Quartz with Trapiche Patterns
An eclectic grouping of gems and minerals at Tucson’s Pueblo show includes South African and Colombian specimens.
An overview of the 2016 gem shows.
An Interesting Rose Quartz from Madagascar
A new find of rose quartz from Madagascar contained some unusual inclusions.
Bismuthinite Inclusions in Rose Quartz from Madagascar
Eye-visible inclusions are common in almost all quartz varieties except rose quartz.