Star Copper Advances to Second Drill Target in BC's Golden Triangle

--Hole B (S_051) - 2^nd of 6 - advancing steadily

VANCOUVER, BC / ACCESS Newswire / June 17, 2025 / Star Copper Corp. (CSE:STCU)(OTCQB:STCUF)(FWB:SOP) ("Star Copper" or the "Company"), a critical mineral exploration and development company, is pleased to provide the latest update from the 2025 drill program at its 100% owned 6,829-hectare (~16,875 acre) flagship Star Project in the "Golden Triangle" of British Columbia. The fully funded campaign focus is on expanding the existing discovery at the Star Project, by increasing its knowledge regarding the Star Main, Star North and Star East prospects, as the results from ongoing fieldwork become available.

Campaign Strategy
The 2025 plan targets both the near-surface oxide zones, deep porphyry-style mineralization, and structures associated with the "Star Fault" and "Dick Creek Fault" with up to 4,000 meters amongst six primary drill holes (Holes A-F).

The Star Main discovery contains an extensive, near-surface, supergene zone, and the summer drill campaign, as described in a Company news release on May 27, is designed to test both the lateral and vertical continuity of mineralized zones previously identified from over $10 million in prior drilling and exploration campaigns. Star Copper aims to investigate beyond previously drilled depths where mineralization was present, but drill rig capacity was not, in addition to examining newly modelled magnetic and chargeability anomalies.

OPERATIONS
Star Copper Drillhole A (S_050), collared on the Star Main target, intersected a sequence of classic cal-alkalic porphyry mineralization that has been encountered in previous drilling. Porphyritic volcanic rocks were intersected by a quartz diorite intrusion between 43 and 85 metres. With an extensive database of historic drilling and understanding of this zone drill Hole A (S_050) has given the Company confirmation that we are in the right spot. The upper 56 metres of the hole define a well-developed supergene enrichment zone, characterized by pervasive copper oxide mineralization including malachite and azurite. Notably, a 9-metre fault gouge interval at the base of this zone returned elevated copper values based on portable XRF readings. (Refer to Figures 1 and 2.)