Handmade antique Mica Marble from Germany, dating back to the early / mid 19th century. This emerald green glass marble features a generous mica content and a distinct double helix dark / oxblood thread running from one pile to the other. In mint condition with a raised pontil point one one side and a faceted pontil finish at the other pole. The marble measures 18.3mm 23/32"Please ask if additional images needed. This marble glows under UV light.