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<p>[QUOTE=&quot;Taupou, post: 103775, member: 45&quot;]The photo of the bottle on its side, with the bottom showing, clearly shows that it is glazed pottery, not made from lava.&nbsp; </p><p><br /></p><p>While over-fired glaze can develop the pits and jagged edges associated with lava, it also has a bumpy, lumpy surface where the bubbles haven&#039;t been broken.&nbsp; If lava is cut and worked on to make smooth beads, on the other hand, it doesn&#039;t have any of those bubbles or lumps, it has a smooth surface with pits.</p><p><br /></p><p>Again, as mentioned earlier, a snuff bottle would not purposely be made with a rough,sharp-edged surface which would not only be unpleasant to the touch, but would also pose the risk of scrapes or cuts while using it.&nbsp; One of the aims of the snuff bottle was to create a pleasing textural quality.&nbsp; Even if it had relief decoration, it was smooth.</p><p><br /></p><p>The comparison to lava is interesting, however, to explain what happens when ceramic glaze is fired too hot.&nbsp; Both are created from earth minerals, primarily silicate, and subjected to high heat which causes chemical reactions. Volcanic lava can occur in a range of final forms, from smooth glass (obsidian) to jagged, sharp edged a&#039;a lava.&nbsp; Ceramic glaze is similar.&nbsp; Depending on the composition of the glaze and the firing time and temperature, a wide range of effects can be created.[/QUOTE]</p><p><br /></p>

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