OREAS 22h has been prepared from quartz sand to which 0.5% iron oxide has been added to produce a pale grey pulp. This colouring gives the material an appearance of primary origin (i.e. non-oxide). It is characterised by extremely low background gold of less than 1 part per billion.
| CRM Code |
Principle Cerified Values |
State |
Matrix |
Mineralization |
| OREAS 22h |
Au < 1ppb |
Cu 6.2 ppm |
Ag <0.050ppm |
primary |
quartz |
≤ barren |