Let's Read & Talk about Gemology with Emily V. Dubinsky
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"Let's Read & Talk about Gemology" with John L. Emmett
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"Let's Read & Talk about Gemology" with Antoinette L. Matlins
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Furnaces, Fluxes and Filling: A Review of Ruby Treatment | GIA Knowledge Sessions Webinar Series
2:58:08
Let's read & talk about Gemology with Gian Carlo Parodi
1:33:01
Fall asleep instantly in 5 minutes, insomnia cure, stress relief music 2
1:03:59
Sacred Waters - 1 Hour Healing Music - Cleanse Your Mind, Body & Spirit
2:06:08
"Let's Read & Talk about Gemology" with John I. Koivula
1:17:49