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Solitario Amends Technical Report and Clarifies Technical Disclosure For Its Florida Canyon Zinc Project

Technical Reports (NI 43-101) Regulatory & Compliance

Solitario Amends Technical Report and Clarifies Technical

Disclosure For Its Florida Canyon Zinc Project

DENVER, CO – May 28, 2021 - Solitario Zinc Corp. (“Solitario” or the “Company”) (NYSE

American: XPL; TSX: SLR) announces that, as a result of a review by staff of the Ontario

Securities Commission, the Company is issuing the following news release regarding its

technical disclosures made with respect to the Florida Canyon Project in Peru.

On April 7, 2021, the Company filed on Sedar “NI 43-101 Technical Report on Resources

Florida Canyon Project, Amazonas Department, Peru (“2021 Technical Report”).” Subsequent

to that filing, the Company referred to technical information contained in its previously issued

2017 “NI 43-101 Technical Report Preliminary Economic Assessment Florida Canyon Zinc

Project Amazonas Department, Peru (“2017 PEA”)” in a news release dated April 7, 2021., on

its website related to the Florida Canyon project and a corporate presentation (PDAC Virtual

Conference) made on March 8, 2021. The 2021 Technical Report did not incorporate certain

required disclosure information from the 2017 PEA to allow the Company to refer to the 2017

PEA. The Company has amended the 2021 Technical Report to include all such information

required from the 2017 PEA to allow the Company to refer to information contained in the 2017

PEA on its website and in corporate presentations. The resource estimates from the 2021

Technical Report did not change as a result of this amendment.

In addition, the Company posted a video on its website on March 6, 2021 and information on

slide 7 in a corporate presentation (PDAC Virtual Conference) made March 8, 2021, that

contained information from an internal analysis concerning mine life and cash flows that are not

supported by a technical report and should not be relied upon. For this reason, the Company is

retracting all references to this internal study.

Information contained within this release is approved by Mr. Walt Hunt, COO for Solitario Zinc

Corp., who is a qualified person as defined by National Instrument 43-101.

About Solitario

Solitario is an emerging zinc exploration and development company traded on the NYSE

American (“XPL”) and on the Toronto Stock Exchange (“SLR”). Solitario holds 50% joint

venture interest in the high-grade, open-pittable Lik zinc deposit in Alaska and a 39% joint

venture interest (Nexa Resources holds the remaining 61% interest) on the high-grade Florida

Canyon zinc project in Peru. Solitario recently acquired the early-stage Gold Coin property in

Arizona that has potential to host gold mineralization. Solitario’s Management and Directors

hold approximately 9.6% (excluding options) of the Company’s 58.4 million shares outstanding.

Solitario’s cash balance and marketable securities stand at approximately US$7.6 million.

Additional information about Solitario is available online at www.solitariozinc.com

FOR MORE INFORMATION ABOUT SOLITARIO, CONTACT:

Valerie Kimball

Director – Investor Relations

(720) 933-1150

(800) 229-6827

Christopher E. Herald

President & CEO

(303) 534-1030, Ext. 14

Cautionary Statement Regarding Forward Looking Information

This press release contains forward-looking statements within the meaning of the U.S. Securities Act of 1933 and the U.S.

Securities Exchange Act of 1934, and as defined in the United States Private Securities Litigation Reform Act of 1995 (and the

equivalent under Canadian securities laws), that are intended to be covered by the safe harbor created by such sections.

Forward-looking statements are statements that are not historical fact. They are based on the beliefs, estimates and opinions of

the Company's management on the date the statements are made and address activities, events or developments that Solitario

expects or anticipates will or may occur in the future, and are based on current expectations and assumptions. Forward-looking

statements involve a number of risks and uncertainties. Consequently, there can be no assurances that such statements will

prove to be accurate and actual results and future events could differ materially from those anticipated in such statements. Such

forward-looking statements include, without limitation, statements regarding the Company’s expectation of the projected

timing and outcome of engineering studies; expectations regarding the receipt of all necessary permits and approvals to

implement a mining plan, if any, at Lik or Florida Canyon; the potential for confirming, upgrading and expanding zinc, lead and

silver mineralized material; future operating and capital cost estimates may indicate that the stated resources may not be

economic; estimates of zinc, lead and silver grades of resources provided are predicted and actual mining grade could be

substantially lower; estimates of recovery rates for could be lower than estimated for establishing the cutoff grade; and other

statements that are not historical facts could vary significantly from assumptions made in the Resources Estimate. Mineral

Resources are not Mineral Reserves and do not have demonstrated economic viability. Although Solitario management believes

that its expectations are based on reasonable assumptions, it can give no assurance that these expectations will prove correct.

Important factors that could cause actual results to differ materially from those in the forward-looking statements include,

among others, risks relating to risks that Solitario’s and its joint venture partners’ exploration and property advancement efforts

will not be successful; risks relating to fluctuations in the price of zinc, lead and silver; the inherently hazardous nature of mining-

related activities; uncertainties concerning reserve and resource estimates; availability of outside contractors, and other

activities; uncertainties relating to obtaining approvals and permits from governmental regulatory authorities; the possibility

that environmental laws and regulations will change over time and become even more restrictive; and availability and timing of

capital for financing the Company’s exploration and development activities, including uncertainty of being able to raise capital

on favorable terms or at all; as well as those factors discussed in Solitario’s filings with the U.S. Securities and Exchange

Commission (the “SEC”) including Solitario’s latest Annual Report on Form 10-K and its other SEC filings (and Canadian filings)

including, without limitation, its latest Quarterly Report on Form 10-Q. The Company does not intend to publicly update any

forward-looking statements, whether as a result of new information, future events, or otherwise, except as may be required

under applicable securities laws.