Solid natural opals are hard to find to make matching opals for bracelet, as each opal is slightly different.black opals are rarest to match than crystal opals and most boulder opals are splits so that colours match good Gold is a noble metal. It is a beautiful metal for use in jewelry and has an old tradition…Most opals in gold bracelets are set in 18 k Italian gold with adjustable lengths. Opals have flash colours when worn so it is easy to recognize an opal bracelet. These opal bracelets are offered at direct wholesale price from opal wholesalers and manufactures