Yellowish green diopside and tremolite from Merelani, Tanzania

Eric A. Fritz, Brendan M. Laurs, Robert T Downs, Gelu Costin

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Four similar-appearing yellowish green samples from Block D at Merelani, Tanzania, were identified as diopside and tremolite. The gems are identical in color, but their standard gemological properties are typical for calcic pyroxene and amphibole. The identification of the diopside was made with Raman spectroscopy, while single-crystal X-ray diffraction and electron-microprobe analyses were used to confirm the amphibole species as tremolite. Absorption spectroscopy (in the visible-mid-infrared range) revealed that the two gem materials are colored by V 3+, Cr 3+, or both.

Original languageEnglish (US)
Pages (from-to)146-148
Number of pages3
JournalGems and Gemology
Volume43
Issue number2
StatePublished - Jun 2007

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Amphibole Asbestos
Gems
tremolite
diopside
amphibole
Raman spectroscopy
atomic absorption spectroscopy
Absorption spectroscopy
electron probe analysis
pyroxene
X-ray diffraction
Single crystals
crystal
Color
Infrared radiation
X ray diffraction
Electrons

ASJC Scopus subject areas

  • Economic Geology

Cite this

Fritz, E. A., Laurs, B. M., Downs, R. T., & Costin, G. (2007). Yellowish green diopside and tremolite from Merelani, Tanzania. Gems and Gemology, 43(2), 146-148.

Yellowish green diopside and tremolite from Merelani, Tanzania. / Fritz, Eric A.; Laurs, Brendan M.; Downs, Robert T; Costin, Gelu.

In: Gems and Gemology, Vol. 43, No. 2, 06.2007, p. 146-148.

Research output: Contribution to journalArticle

Fritz, EA, Laurs, BM, Downs, RT & Costin, G 2007, 'Yellowish green diopside and tremolite from Merelani, Tanzania', Gems and Gemology, vol. 43, no. 2, pp. 146-148.
Fritz, Eric A. ; Laurs, Brendan M. ; Downs, Robert T ; Costin, Gelu. / Yellowish green diopside and tremolite from Merelani, Tanzania. In: Gems and Gemology. 2007 ; Vol. 43, No. 2. pp. 146-148.
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