Vincent Pardieu
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View article: Pink to Purple Sapphires from Ilakaka, Madagascar: Insights to Separate Unheated from Heated Samples
Pink to Purple Sapphires from Ilakaka, Madagascar: Insights to Separate Unheated from Heated Samples Open
The present study is focused on the analysis of zircon inclusions found in pink to purple sapphires from Ilakaka (Madagascar) with an optical microscope, Fourier-transform infrared (FTIR), and micro-Raman spectroscopy in order to update pr…
View article: Ruby Deposits: A Review and Geological Classification
Ruby Deposits: A Review and Geological Classification Open
Corundum is not uncommon on Earth but the gem varieties of ruby and sapphire are relatively rare. Gem corundum deposits are classified as primary and secondary deposits. Primary deposits contain corundum either in the rocks where it crysta…
View article: Remarkably uniform oxygen isotope systematics for co-existing pairs of gem-spinel and calcite in marble, with special reference to Vietnamese deposits
Remarkably uniform oxygen isotope systematics for co-existing pairs of gem-spinel and calcite in marble, with special reference to Vietnamese deposits Open
Oxygen isotope systematics for co-existing pairs of gem-spinel and calcite in marble from Vietnam and other worldwide deposits have been determined in order to characterize the O-isotope fractionation between calcite and spinel. In Vietnam…
View article: Trace elements and oxygen isotopes of gem spinels in marble from the Luc Yen - An Phu areas, Yen Bai province, North Vietnam
Trace elements and oxygen isotopes of gem spinels in marble from the Luc Yen - An Phu areas, Yen Bai province, North Vietnam Open
Trace elements investigated by electron microprobe analysis (EMPA) have been combined with oxygen isotopic composition of pink, red and other colored spinels (blue, purple, brown, orange, lavender) hosted by marbles and found in placers fr…
View article: Mozambique: A Ruby Discovery for the 21st Century
Mozambique: A Ruby Discovery for the 21st Century Open
Republic of Mozambique is located in south- eastern Africa along the Indian Ocean.Separated from Madagascar by the Mozambique Channel, it is bordered by Tanzania to the north, South Africa to the south, and Zimbabwe, Malawi, and Zambia to …