London Metal Exchange cash zinc broke through US$3500 per tonne on Thursday, and extended those gains on Friday, rising by a further 0.5% to $3519.50/t.
Zinc is up by nearly 5.5% so far this year and by close to 10.8% since the start of December.
Cobalt was another standout, rising by another 0.3% to $79,623/t, the highest close since the metal started trading on the LME.
It comes after the Democratic Republic of Congo passed a new mining code.
Copper dropped for the second day running, but remained above $7000/t.
Nickel rose to its highest level since June 2015 on Thursday, but dropped by 0.3% to $13,618.50/t on Friday.