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<p>[QUOTE=&quot;Joan, post: 10100221, member: 5398&quot;]Thanks, Lucille.&nbsp; I decided to actually read my Sibylle Jargstorf book, &quot;Baubles, Buttons and Beads The Heritage of Bohemia,&quot; and found information on the history of mouth-blown iridized glass beads, and also some information on gold-lined beads (which are shown in the photos above).&nbsp; I&#039;m still working on typing up excerpts, but from what I&#039;ve read so far, I think the iridized black beads are probably made from &quot;stone&quot; glass, which was produced throughout the 19th century by anonymous Gablonz makers for use in beads, buttons, and gemstones.</p><p><br /></p><p>This is a quote from the Jargstorf book, &quot;</p><p>“In 1856, a Hungarian chemist had introduced the surface decoration of iridescence; such glass was shown for the first time at the World Fair in Vienna in 1873. Paul Weiskopf was extremely fascinated by this glass, but because the original maker was very secretive about his procedure Weiskopf had to experiment extensively to find his own method, which he published in 1876. After the World Fair in Paris in 1878, iridized glass became a craze in Europe and North America.”[/QUOTE]</p><p><br /></p>

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