DEMANTOID FROM VAL MALENCO, ITALY: REVIEW AND UPDATE

被引：21

作者：

Adamo, Ilaria

Bocchio, Rosangela ^{[1
,2
]}

Diella, Valeria ^{[2
]}

Pavese, Alessandro ^{[1
,2
]}

Vignola, Pietro ^{[2
]}

Prosperi, Loredana ^{[3
]}

Palanza, Valentina ^{[4
]}

机构：

[1] Univ Milan, Dept Earth Sci, I-20122 Milan, Italy

[2] CNR, Natl Res Council, IDPA, Sect Milan, I-00185 Rome, Italy

[3] IGI, Lab Milan, Milan, Italy

[4] Univ Milano Bicocca, Dept Mat Sci, Milan, Italy

来源：

GEMS & GEMOLOGY | 2009年 / 45卷 / 04期

关键词：

D O I：

10.5741/GEMS.45.4.280

中图分类号：

P57 [矿物学];

学科分类号：

070901 ;

摘要：

New data are presented for demantoid from Val Malenco, Italy, as obtained by classical gemological methods, electron microprobe and LA-ICP-MS chemical analyses, and UV-Vis-NIR and mid-IR spectroscopy. The results confirmed that these garnets are almost pure andradite (>= 98 mol%, RI > 1.81, SG = 3.81-3.88). All 18 samples studied contained "horsetail" inclusions, which are characteristic of a serpentinite geologic origin. Fe and Cr control the coloration of demantoid, though color variations in these samples were mainly correlated to Cr content.

引用

页码：280 / 287

页数：8

共 21 条

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