http://209.237.165.96/4csblog/2013/tourmaline-octobers-birthstone Diamond 4Cs and Gemstone Information Tue, 24 Jul 2018 14:47:00 +0000 hourly 1 https://wordpress.org/?v=3.9.40 http://209.237.165.96/4csblog/2013/tourmaline-octobers-birthstone#comment-696 Fri, 04 Oct 2013 18:13:00 +0000 http://4csblog.gia.edu/?p=2698#comment-696 Tourmaline may sometimes have been confused with other stones, but it was also identified, recognizable by its thermolectric and piezoelectric properties, very early. Pliny mentioned it in his Natural History, as did al Tifaschi in the 13th c.

]]> http://209.237.165.96/4csblog/2013/tourmaline-octobers-birthstone#comment-695 Fri, 04 Oct 2013 17:58:00 +0000 http://4csblog.gia.edu/?p=2698#comment-695 Thanks for the beautiful tourmaline pics, stunning!

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