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Man has been making glass since the third millennium BC and during the manufacture of ancient glass, antimony, in a metal or mineral form, was added to make it colourless or opaque.

Different antimony ores have slightly different antimony isotope ratios and researchers in Belgium and the UK have developed an inductively-coupled plasma mass spectrometry (ICP-MS) method to detect and quantify these tiny differences. By analysing samples of Roman glass, the team hope to uncover clues about how the glass was made and the geographical provenance of the raw materials.

Read more: http://www.rsc.org/chemistryworld/2013/04/roman-glass-antimony-isotope-analysis-icp-ms

Extraordinary brightly-coloured glass jewellery believed to be from Ancient Egypt has been found in a 2,400-year-old burial mound in Siberia.

Nicknamed 'Cleopatra's Necklace' by the Russians who found it, the jewellery was discovered on the skeleton of a 25-year-old woman, believed to have been a virgin priestess.
Although it was discovered during a dig nine years ago, this is the first time a picture of the priceless 17-bead necklace has been shown since it was found in the Altai Mountains by archaeologist Yelena Borodovskya.


Read more: http://www.dailymail.co.uk/news/article-2272817/Ancient-Egyptian-necklace-skeleton-virgin-priestess-Siberian-burial-mound.html