Is this Marcus aurelius? New coin from ground After cleaning. ( I make some mystake with cleaning. I try with brush and I wont do again. Because I think leave some traces on coin. Its beter with lemon juice or backing soda I also founs that nice fibula.
@Bojan - amazing coin to pull from the ground! I personally would not clean at all - I would prefer to have the "from the ground patina" when it looks as nice as your original photo. Septimius Severus Denarius 196-197 AD. Obv: L SEPT SEV PERT AVG IMP VIIII, laureate head right Rev: HERCVLI DEFENS, Hercules standing right, holding club on ground in right hand, bow in left
something like that. I see one guy to do this and I try. Coin is very shine. Clean all dirth but I think it's also traces on coin. So I never do this again. Maybe this on picture is not so rough.
The geologist's refrain: Objects scratch objects that they are harder than. Brass is harder than silver and will scratch it, but it is softer than bronze and will not scratch a bronze coin (although if the coin has a delicate patina, it WILL scratch that, so always test first). There are silver-bristle brushes out there, but they are difficult to track down and pretty expensive. Plus, the specific purity and alloy is critical in determining whether or not it will scratch your silver coin. To be safe, stick with nylon bristles for silver coins.
That would be alright to use (within reason) on dirty and encrusted bronze coins, but not silver, no. I got a cheap toothbrush and cut the brush bristles down to make them scrub tougher, but that is safe to use, and what I'd start with on any coin before moving to something more intense. That cut down toothbrush should be enough to get away simple dirt (in combination with distilled water soaks). Keep on hunting for those treasures, @Bojan! We love seeing them!
Mud includes sand which is harder than any coin metal so no brush is safe to use on a coin with sand on the surface. Rinse off the dirt first. I know US metal detectorists who have found large cents (soft copper) and ruined them within seconds rubbing vigorously with fingers. Skin is soft but dirty hands are sandpaper. Carry water for rinsing.
