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<p>[QUOTE=&quot;Bronwen, post: 433732, member: 5833&quot;]Lava is a pain it the sits-parts.&nbsp; As you say, the porosity creates problems, including soaking up oils.&nbsp; It also allows it to be dyed, which most pieces seem to be.&nbsp; Just splashing water on them can create spots.&nbsp; I have a tiny cameo of Saturn I think is not dyed, a jumble of colors with fault lines between them.&nbsp; He rattled a little in his setting; less after a good soak, so actually swelled a bit.&nbsp; Should probably hydrate him again.</p><p><br /></p><p>[ATTACH=full]151986[/ATTACH] [ATTACH=full]151987[/ATTACH] </p><p>[ATTACH=full]151988[/ATTACH]</p><p><br /></p><p>A friend &amp; I debated about whether a cameo should be called &#039;lava&#039; or &#039;limestone&#039;; he was saying limestone because the material bubbled when acid was dropped on it.&nbsp; This led me to learn that all of southern Italy is sitting on a massive limestone shield, which Vesuvius punches through.&nbsp; The fine particles compacted into what we call Vesuvian &#039;lava&#039; when talking cameos no doubt are mostly limestone.</p><p><br /></p><p>I know mother of pearl is one of the recommended materials for use in handling caviar, and I see little MOP spoons described in some places as being for caviar, in others as being for mustard.&nbsp; Did not come across any that were really the little ladle shape needed to sit in a mustard pot.&nbsp; I would think almost any material would suffer if left too long in mustard, or the mustard would.&nbsp; I&#039;m not enough of a chemist to have a good understanding of the hazards of salty caviar vs. vinegary mustard.[/QUOTE]</p><p><br /></p>

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