1.81ct Pear Shape Faceted Fire Opal 12x7mm Bergeon Rotation Machine Rockwell hardness 54-56C

Rockwell hardness 54-56C

20 Punches

Material: High Speed Steel (HSS4341)

Clamp On Bench Vice

Face diameter: Ø65mm

1.81ct Pear Shape Faceted Fire Opal 12x7mm Bergeon Rotation Machine Rockwell hardness 54-56CFire 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.;