Special Report on Red Feldspar

August 1, 2011

A compilation of ongoing research into red feldspar and its sources around the world, as well as the detection of various color treatment processes.

Introduction—Red Feldspar: A Puzzle to Fix
A Mine Trip to Tibet and Inner Mongolia: Gemological Study of Andesine Feldspar
The Red Feldspar Project
Copper Diffusion in Plagioclase
Observations on Identification of Treated Feldspar
Observation on Effects of Heating and Copper Diffusion in Feldspar
Andesine: Timeline of a Controversy
Geology and Field Studies of Reported Andesine Occurrences in the Shigatse Region of Tibet
Argon Isotope Studies of Andesine Collected During the 2010 Expedition to Tibet
Silver Incorporation in Inner Mongolian and Tibetan Andesine
Observations of Surface Residue Features Found on Andesine from China
A Study of Andesine Matrix Specimens Purported to be from Tibet
SEM Study of Red Andesine
Separation of Natural Red Andesine from Tibet and Copper-Diffused Red Andesine from China