Highlights from one hole drilled to a depth of 260.24m that intersected two zones of high-grade mineralisation included: a 2.61m wide lower mineralised intersection - averaging 5.2% copper, 1.3% tin and 77g/t silver.
"The confirmation of silver in the system adds to the potential for the area," said chief executive Richard Williams.
The explorer is also awaiting assay results from four additional holes that intersected similar mineralised zones and another hole that intersected a new zone of mineralisation between 204-209.6m, containing native copper. The zone is approximately 100m above the target depth of the lithium lode and could represent a completely new target, the company believes.
"The United Downs project has numerous additional targets that we will be testing throughout the course of this year, including the downdip extension of the historic Mount Wellington Mine, which operated until 1978, and a further lode to the south of Mount Wellington, which was discovered in the 1970s but never followed up after the mine closed," Williams added.
Drilling at United Downs so far has tested 200m of a strike extent within the potentially 900m long target zone.
Cornish shares rose 2.1% at Tuesday lunchtime to 14.5p versus the previous day's close, valuing the company at just over £38 million.