HIGH-GRADE GOLD HITS RETURNED FROM YUNNDAGA DIAMOND DRILLING

Brightstar advances Menzies Gold Project with visible gold and standout intercepts

Brightstar Resources Limited (ASX:BTR) has released final assay results from its ~6,400m Reverse Circulation (RC) and Diamond (DD) drilling program at the Yunndaga deposit, part of the company’s broader Menzies Gold Project in Western Australia.

The deposit currently hosts a Mineral Resource Estimate (MRE) of 0.6Moz @ 1.4g/t Au, with the Yunndaga component contributing 3.4Mt @ 1.4g/t Au for 156koz. The program targeted infill and extensional zones to support an upcoming MRE upgrade, underground mine design, and the declaration of maiden Underground Ore Reserves.

Drill highlights include:

YNRCD25040:
▪︎ 7m @ 5.70g/t Au from 230m, including 0.6m @ 54.8g/t Au from 234.8m
YNDD25003:
▪︎ 10.6m @ 2.28g/t Au from 217m, including 1.1m @ 11.9g/t Au from 225.6m
YNRCD25041:
▪︎ 4m @ 2.51g/t Au from 262m, including 1m @ 8.45g/t Au from 265m

These diamond results complement RC assays reported earlier in September, with notable intercepts including:

YNRCD25022:
▪︎ 16m @ 8.03g/t Au from 220m
YNRCD25053:
▪︎ 8m @ 6.67g/t Au from 245m, including 4m @ 10.6g/t Au from 249m
YNRCD25056:
▪︎ 4m @ 6.73g/t Au from 46m, including 1m @ 18.4g/t Au from 46m

Importantly, visible gold was intersected in three separate diamond drill holes, with assays confirming high-grade mineralisation. The results support the development of Yunndaga into Brightstar’s third underground mine, targeted for commencement in CY2026.

Brightstar’s Managing Director, Alex Rovira, commented:
These diamond drillhole results from Yunndaga mark the completion of another important phase of exploration activity at Menzies, with the RC and diamond drilling completed in order to facilitate the development of Yunndaga as Brightstar’s third underground mine targeted in CY2026.

The holes confirm the grades identified in the recent large-scale RC program and have supplied further sample material for Brightstar’s detailed metallurgical and geotechnical work to further de-risk this exciting underground development story.

Across the rest of the portfolio, the exploration work is not slowing down with three surface rigs currently drilling at
the Sandstone Hub (diamond, aircore, and RC), targeting material growth and improvements to the confidence
classification of Sandstone’s 2.4Moz @ 1.5g/t Au Mineral Resource Estimate. In Laverton, an underground diamond
core rig is currently active at the Fish mine – targeting depth extensions to the ore body to provide mine life
extensions, and an additional RC rig has just arrived at Lord Byron to follow-up on the exciting exploration results
reported recently