These are vintage Japanese and made in the style of carved netsuke; however they are made of molded polyresin. On today's market these can sell for as high as $5 - $20 per bead.
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Polyresins made from stone powder can actually be weightier than one imagines. It is the fluidity of the edges and the almond shape that indicate these are actually molded. Unlike molded glass or porcelain, the seam lines on these can be easily buffed. Then these were 'aged' with a tannin or tea polish to give the surface color.
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