3.96ct Cushion Cut Fire Opal 11.7x9.9mm Bergeon 8744 Bracelet Holding Block Head width 28mm

Head width 28mm

Can also be used with Horotec tools 07

155 x 360 x 12 DBH End

Mainspring sleeve sizes (inside diameter):

40 and 50gm

3.96ct Cushion Cut Fire Opal 11.7x9.9mm Bergeon 8744 Bracelet Holding Block Head width 28mmFire Opal is an unusual variety of opal gemstone from Mexico, with colours ranging from yellow to orange and orange red. Depending on the origin of the stone it might be very fragile which makes it more suitable for jewellery such as necklaces, brooches and earrings that are less likely to be knocked. Opal is the birthstone for October. Mohs Scale of Hardness: 5. 5 6. 5 Sources: The most famous source of fire opals is the state of Quertaro in Mexico.;