Mosaic Announces Closing of 113 North Property Option

MOSAIC MINERALS CLOSES 113 NORTH PROPERTY OPTION

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Montreal Quebec, June 1 5, 2021 – The management of Mosaic Minerals Corp. (“Mosaic” or the

“Company”) (CSE: MOC) announces:

Gaboury Nickel-Copper-Gold Property Option Closed

Further to Mosaic’s news release of June 9, 2021 the Option Agreement with Fokus Mining Corporation

(“Fokus”) providing for an earn -in of up to 50% interest in 59 claims totalling 3010 hectares located

north of the Val d’or mining district in Abitibi, Quebec has closed.

Pursuant to the June 8, 2021 Earn-in Option Agreement Mosaic may earn up to an 50% interest in the

113 North Property by issuing to 2,000,000 shares to Fokus and incurring $500,000 of exploration

expenditures over four years. (For more complete details see June 9, 2021 news release). The 2,000,000

shares were issued June 14, 2021 and are subject to an invest hold peri od ending October 15, 2021.

Upon the issuance of the 2,000,000 shares Fokus holds 14% of Mosaic’s issued capital.

About Mosaic Minerals Corporation

Mosaic Minerals Corp. is a Canadian mineral exploration company listed on the Canadian Security

Exchange (CSE: MOC) now focusing on the exploration for future strategic Copper-Nickel-Zinc deposits

in priority on the Quebec Province territory which have a long and successful history of base metal

production principally in the Rouyn -Noranda, Matagami, Vald’Or and Chibougamau mining camps.

Exploring for base metal was put on hold a few decades ago to the profit of exploring for gold but the

potential for discovering large Cu, Zn, Ni deposits is still very present.

On Behalf of the Board

M. Guy Morissette

President & CEO

Contact: Guy Morissette at 1-514-531-8129

www.mosaicminerals.ca

This release contains certain "forward -looking information" under applicable Canadian securities laws concerning the Arrangement. Forward -looking

information reflects the Company’s current internal expectations or beliefs and is based on information currently available to the Company. In some cases

forward-looking information can be identified by terminology such as "may", "will", "should", "expect", "intend", "plan", "anticipate", "believe", "estimate",

"projects", "potential", "scheduled", "forecast", "budget" or the negative of those terms or other comparable terminology. Assumptions upon which such

forward-looking information is based includes, among others, that the conditions to closing of the Arrangement will be satisfied and that the Arrangement

will be completed on the terms set out in the definitive agreement. Many of these assumptions are based on factors and events that are not within the

control of the Company, and there is no assurance they will prove to be correct or accurate. Risk factors that could cause actual results to differ materially

from those predicted herein include, without limitation: that the remaining conditions to the Arrangement will not be satisfied; that the business prospects

and opportunities of the Company will not proceed as anticipated; changes in the global prices for gold or certain other commodities (such as diesel,

aluminum and electricity); changes in U.S. dollar and other currency exchange rates, interest rates or gold lease rates; risks arising from holding derivative

instruments; the level of liquidity and capital resources; access to capital markets, financing and interest rates; mining ta x regimes; ability to successfully

integrate acquired assets; legislative, political or economic developments in the jurisdictions in which the Company carries on business; operating or technical

difficulties in connection with mining or development activities; laws and regulations governing the protection of the enviro nment; employee relations;

availability and increasing costs as sociated with mining inputs and labour; the speculative nature of exploration and development; contests over title to

properties, particularly title to undeveloped properties; and the risks involved in the exploration, development and mining b usiness. Risks and unknowns

inherent in all projects include the inaccuracy of estimated reserves and resources, metallurgical recoveries, capital and op erating costs of such projects,

and the future prices for the relevant minerals.

The Canadian Securities Exchange does not accept responsibility for the adequacy or accuracy of this release.