Miner Herencia Resources' share price rose by almost a quarter on Friday after sampling tests at its 70%-owned Chilean project revealed high grade copper and silver.Result from surface sampling around 200m south-west of its La Rosa prospect in the Paguanta Project, located in northern Chile, showed grades of up to 2.6% copper and 202g/t silver."Importantly, the La Rosa prospect is within close proximity to both the Doris prospect, where copper and silver have been confirmed on surface and in diamond drill holes, and the Patricia zinc-silver-lead-gold Mineral Resource," the statement said.Herencia's managing director Michael Bohm said that the discovery further enhances the "porphyry prospectivity" of the Paguanta lease.---BC