Gem-quality chrysoprase from Haneti-Itiso area, Central Tanzania

Gem-quality chrysoprase from Haneti-Itiso area, Central Tanzania

Gem-quality, apple-green, Ni-bearing chalcedonic quartz occurs as near-surface veins in silicified serpentinite in the Haneti-Itiso area, Central Tanzania. AAS determinations revealed a high Ni content, 0.55 wt.%, and low Co and Cr contents of 120 and 1 ppm respectively. NAA determination revealed n...

Full description

Bibliographic Details
Main Authors: K.A. Kinnunen, E.J. Malisa
Format: Article
Language:English
Published: Geological Society of Finland 1990-12-01
Series:Bulletin of the Geological Society of Finland
Subjects:
gems
Chrysoprase
chemical composition
X-ray diffraction data
spherules
fluid inclusions
crystallization
Archaean
Tanzania
Online Access:http://www.geologinenseura.fi/bulletin/Volume62/sgs_bt_062_2_pages_157_166.pdf

Internet

http://www.geologinenseura.fi/bulletin/Volume62/sgs_bt_062_2_pages_157_166.pdf

Similar Items