14K Pear Opal Millgrain Threadless End Color:Yellow gold which is a form of

which is a form of chalcedony and a microcrystalline quartz

and the large size measures 3mm x 5

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14K Pear Opal Millgrain Threadless End Color:Yellow gold which is a form ofJunipurr Jewelry. The Pear Double Millgrain with Synthetic Opal piece features a 1. 5mm opal stone adorned by two close set rows of metal beads (millgrain). This threadless decorative end is available in 14 karat Yellow Gold, White Gold and Rose Gold options. Measuring 4. 45mm x 5. 95mm, it can be used in any piercing that is fit with a threadless post from all major jewelry vendors.