Projects
Heemskirk Tin Project
Stellar’s 100% owned Heemskirk Tin Project is strategically located within the well-established mining town of Zeehan on the West Coast of Tasmania. The Project is close to critical infrastructure including renewable energy sources (Wind and Hydro) with access to the Burnie Port 150km to the north via sealed road providing access to world markets.
The Heemskirk Tin Project includes three nearby tin deposits: Severn, Queen Hill and Montana. Stellar holds secure Mining Leases over the Heemskirk Tin Project including the tailings pipeline route, tailings storage site and also over the St Dizier satellite tin deposit.
In addition to the Heemskirk Tin Project, Stellar owns a portfolio of nearby Exploration Licences including the Montana Flats EL, which contains a number of historic silver-lead-zinc mines with associated tin mineralisation, and the Oonah tin deposit.
Mineral Resource Estimate
Following the completion of resource drilling an updated Heemskirk Tin Project Total Mineral Resource Estimate (MRE) of 13.36Mt @ 0.86% Sn (115.3kt contained Sn) at a cut-off grade of 0.4% Sn was defined in July 2026 in accordance with the JORC Code 2012. The updated Indicated Mineral Resource of 8.31Mt @ 0.87% Sn (71.93kt contained tin) for Heemskirk represents a 60% increase in contained tin from the previous September 2023 MRE, significantly increasing confidence in the Project.
Heemskirk Tin Project Mineral Resource Statement (June 2026), reported at 0.4% Sn cut-off
| Classification | Deposit | Tonnes (Mt) | Sn (%) | Sn Tonnes (kt) | Cassiterite % of Total Sn (%) | Cu (%) | Pb (%) | Zn (%) | Year |
| Indicated | Upper Queen Hill 1 | 0.54 | 0.81 | 4.39 | 83.2 | 0.13 | 1.20 | 0.62 | 2026 |
| Lower Queen Hill | 1.72 | 0.97 | 16.80 | 98.0 | 0.03 | 0.25 | 0.30 | 2026 | |
| Severn 2 | 6.05 | 0.84 | 50.74 | 98.7 | 0.07 | 0.02 | 0.03 | 2026 | |
| Indicated Total | 8.31 | 0.87 | 71.93 | 97.5 | 0.06 | 0.14 | 0.12 | ||
| Inferred | Upper Queen Hill | 0.2 | 0.66 | 1.5 | 86 | 0.27 | 1.19 | 0.12 | 2026 |
| Lower Queen Hill | 1.6 | 0.75 | 12.2 | 99 | 0.03 | 0.06 | 0.07 | 2026 | |
| Severn 1 | 2.5 | 0.77 | 19.3 | 99 | 0.05 | 0.04 | 0.03 | 2026 | |
| Montana 1,3 | 0.7 | 1.54 | 10.4 | 96 | 0.08 | 0.72 | 1.42 | 2019† | |
| Inferred Total | 5.0 | 0.86 | 43.4 | 98.2 | 0.06 | 0.11 | 0.05 | ||
| Grand Total | 13.36 | 0.86 | 115.3 | 97.8 | 0.06 | 0.13 | 0.10 | ||
†Montana 2019 MRE reported at a 0.6% cut-off grade.
Tonnages and grades have been rounded to appropriate significant figures to reflect the relative accuracy of the estimates. Minor discrepancies may occur in the sum of individual items and their corresponding totals due to this rounding.
[1] ASX Announcement 23 February 2026 – Queen Hill Resource Up 41%
[2] ASX Announcement 4 September 2023 – Heemskirk Tin Project MRE Update
[3] ASX Announcement 16 May 2019 – Updated Heemskirk Resource Increases Indicated Category and Confidence in the Project.