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Appia Announces Exceptional Overlimit Total Rare Earth Oxide (TREO) Results From Its Diamond Drilling Program at PCH Project in Goias, Brazil

Drilling Confirms the Carbonatitic Breccia High Grade Zone Mineralization

Toronto, Ontario--(Newsfile Corp. - March 10, 2025) - Appia Rare Earths & Uranium Corp. (CSE: API) (OTCQB: APAAF) (FSE: A0I0) (MUN: A0I0) (BER: A0I0) (the "Company" or "Appia") is excited to announce the geochemical overlimit assay results of its diamond drilling program on the high grade carbonatitic breccia located on the PCH project in the State of Goias, Brazil. The three drillholes (see Map 1) intercepted substantial Total Rare Earth Oxide (TREO), Niobium Oxide (Nb2O5) and Phosphate Oxide (P2O5) from the brecciated carbonatite intrusion identified in the Southwest Extension Zone of Target IV. A total 97 intervals from the total of 516 presented samples resulted with 'overlimit readings' for La, and/or Ce, and/or Pr, and/or Nd, and/or Nb. The full set of results are available through this . The PCH project hosts two distinct styles of mineralization - Ionic Adsorption Clay (IAC) as well as hard rock carbonatitic breccia. Recent results from the IAC zone can be found by clicking here .

Tom Drivas, CEO stated: "Today's re-assayed overlimit results further support the presence of an extraordinary, high-grade mineralization found within a carbonatitic breccia zone located at the Southwest Extension Zone of Target IV at the PCH project, and this is in addition to significant IAC rare earths mineralization with good TREO results and excellent desorption and kinetics. The original results reported on January 22^nd, 2025 highlighted that the high grade rare earths mineralization was from top to bottom of each of the three drillholes, and today's results increase the average TREO grades by 19% and the average Niobium grades by 23% from the original values reported. (). The results from the diamond drill holes are exceptional and would rank 2^nd, 3^rd, and 4^th on the list of the best intercepts of the past year when compared to the recently reported results by MinerDeck, which highlighted the top REE intercepts of 2024. (Please )."

Highlights:

PCH-DDH-002

• 150m@ 1.34% TREO, 0.13% Nb2O5 from surface

  • including 10m@ 4.11% TREO, 0.23% Nb2O5 from 37m

  • Including 10m@ 2.24% TREO, 0.17%Nb2O5 from 91m

  • including 6m@ 3.94% TREO, 0.22% Nb2O5 from 144m

PCH-DDH-003

• 147m@ 2.00% TREO, 0.23% Nb2O5 from surface

  • including 31m@ 3.60% TREO, 0.52%Nb2O5 From 3m

  • including 8m @ 3.68% TREO, 0.31% Nb2O5 from 47m

  • including 9m@ 2.35%TREO, 0.11% Nb2O5 from 117m

PCH-DDH-004

• 153m@ 1.32% TREO, 0.20% Nb2O5 from surface

  • including 9m@ 3.01% TREO 0,26% Nb2O5 from 11m

  • including 10m @ 5.68% TREO, 0.44% Nb2O5 from 42m

  • including 22m@ 1.13% TREO 0.44% Nb2O5 from 138m

• Increases the average TREO grades by 19% and average Niobium grades by 23% from the original values reported.

• A total 97 intervals from the total of 516 presented samples resulted with 'overlimit readings' for La, and/or Ce, and/or Pr, and/or Nd, and/or Nb.

• All three (3) Diamond Drillholes (DDH) ended in mineralization indicating a potential to extend the zone at depth, northeast, northwest and southwest.

• The PCH project has two distinct styles of mineralization - Ionic Adsorption Clay (IAC) as well as hard rock carbonititic breccia. Recent results from the IAC zone can be found by .

• The full set of results are available through this . The diamond drillhole coordinates are available using this .

The location of the PCH project is extremely favorable with easy access to road and power infrastructure, and the Company enjoys a very friendly and supportive relationship with the local cattle farming community.

Map 1 - Location of drillholes PCH-DDH-002, PCH-DDH-003 and PCH-DDH-004.

To view an enhanced version of this graphic, please visit:

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Drillholes are inclined and reported intervals are apparent thickness. The material produced from the diamond drillholes are sampled at one metre intervals splitting the core in half, resulting in average sample sizes of 2-3 kg. The other Half core is kept in storage for further tests. The original core was logged and photographed.

The bagged samples are sent to the ALS laboratory in Goiânia, Goias for initial preparation and sent to Lima Peru for final analysis. In addition to the internal QA/QC of the ALS Lab, Appia includes its own control samples in each batch of samples sent to the laboratory.

Quality control samples, such as blanks, duplicates, and standards (CRM) were inserted into each analytical run. For all analysis methods, the minimum number of QA/QC samples is three standards, one duplicate and one blank, introduced in each batch. Several batches were used to comprises the full-length hole. The rigorous procedures are implemented during the sample collection, preparation, and analytical stages to insure the robustness and reliability of the analytical results.

All analytical results reported herein have passed internal QA/QC review and compilation. All assay results of DDH samples were provided by ALS, a Certified Laboratory, which performed their measure of the concentration of rare earth elements (REE) with the ME-MS81 analytical method that uses lithium borate fusion prior acid dissolution and Inductively Coupled Plasma Mass Spectrometry (ICP-MS). Major Element Oxides were done using ME_ICP06 analytical method using lithium borate fusion and inductively coupled plasma atomic emission spectroscopy (ICP-AES). Au, Pt and Pd samples were analysed using the fire assay method PGM-ICP27. Desorption analysis with ME-MS19 analytical method was executed for the initial 35 metres of each drillholes with samples being leached with a solution of Ammonium Sulphate at 0.5 molar, pH 4, room temperature for 20 minutes. The leached solution content was analysed using ICP-AES/ICP-MS. ()

The technical information in this news release, including the information related to geology, drilling, and mineralization, has been reviewed and approved by Don Hains, P. Geo., a consultant to Appia. Mr, Hains is Registered Geoscientist (P.Geo) in Ontario (#0494) and a Qualified Person (QP) as defined by National Instrument 43-101 - Standards of Disclosure for Mineral Projects.

About Appia Rare Earths & Uranium Corp. (Appia)

Appia is a publicly traded Canadian company in the rare earth element and uranium sectors. The Company holds the right to acquire up to a 70% interest in the PCH Ionic Adsorption Clay Project (See June 9^th, 2023 Press Release - Click ) which is 42,932.24 ha. in size and located within the Goiás State of Brazil. (See January 11^th, 2024 Press Release - ) The Company is also focusing on delineating high-grade critical rare earth elements and gallium on the Alces Lake property, and exploring for high-grade uranium in the prolific Athabasca Basin on its Otherside, Loranger, North Wollaston, and Eastside properties. The Company holds the surface rights to exploration for 94,982.39 hectares (234,706.59 acres) in Saskatchewan. The Company also has a 100% interest in 13,008 hectares (32,143 acres), with rare earth elements and uranium deposits over five mineralized zones in the Elliot Lake Camp, Ontario.

Appia has 153 million common shares outstanding, 177 million shares fully diluted.

Cautionary note regarding forward-looking statements: This News Release contains forward-looking statements which are typically preceded by, followed by or including the words "believes", "expects", "anticipates", "estimates", "intends", "plans" or similar expressions. Forward-looking statements are not a guarantee of future performance as they involve risks, uncertainties and assumptions. We do not intend and do not assume any obligation to update these forward-looking statements and shareholders are cautioned not to put undue reliance on such statements.

Neither the Canadian Securities Exchange nor its Market Regulator (as that term is defined in the policies of the CSE) accepts responsibility for the adequacy or accuracy of this release.

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