Let's Read & Talk about Gemology with Emily V. Dubinsky
2:10:14
"Let's Read & Talk about Gemology" with John L. Emmett
2:06:08
"Let's Read & Talk about Gemology" with John I. Koivula
2:26:38
«30 years in Bangkok from Treatments to Gem Cutting & Trading», with Karim Guerchouche
2:14:18
Let's read & talk about Gemology with Emmanuel Fritsch
2:19:52
"Let's Read & Talk about Gemology" with Antoinette L. Matlins
2:59:56
Let's read & talk about Gemology with Edward Boehm.
1:10:08
432 Hz - Tibet Flütünün Sesi, Pozitif Enerjiyi Çeker, Birikmiş Stresi Ortadan Kaldırır
42:33