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- Title
Blue-Green PLAGIOCLASE FELDSPAR, Possibly Colored by Copper.
- Authors
Inns, Alethea; Breeding, Christopher M.
- Abstract
The article describes a chemical analysis done on two samples of bluish green plagioclase feldspar which suggested that they were colored by copper. It is noted that a combination of natural irradiation and trace concentrations of lead and water contributes to the blue-to-green color of potassium feldspar, known in the trade as amazonite. It was observed by inspectors that the rocks lacked the mottled grid-like color patterns that characterize amazonite. Laser ablation-inductively coupled plasma-mass spectrometry and electron microprobe analyses were used to examine the feldspar.
- Subjects
PLAGIOCLASE; FELDSPAR; COPPER; IRRADIATION; AMAZONITE; LASER ablation; INDUCTIVELY coupled plasma mass spectrometry
- Publication
Gems & Gemology, 2008, Vol 44, Issue 2, p160
- ISSN
0016-626X
- Publication type
Article