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RJX.A.V ·

RJK Explorations Exploration and Corporate Update

Corporate Updates

P.O. Box 1053, 4 Al Wende Avenue, Kirkland Lake, ON P2N 3L1 Tel: (705) 568-7956

RJK Explorations Exploration and Corporate Update

Kirkland Lake, Ontario – May 31,2021 – RJK Explorations Ltd. (TSX-V: RJX.A, US OTC: RJKAF) (“RJK” or “the

Company”) is halfway through a minimum 10-hole drill program to follow up on its original diamondiferous

Kon Kimberlite sill discovery, originally announced February 5, 2020. The objective is to establish the source

feeder location, create a 3D model, and correlate the different kimberlite layers to optimize the

microdiamond sampling by discrete phases. As of May 31, 2021, five drill holes have been completed with

correlatable phases recognized between holes. A brief description of the geological logging follows:

KON-21-01: This diagonal hole was planned to extend the KON kimberlite structure northward into the

magnetic high, rimming the main kimberlite discovery. The drill hole advanced through 6.5 m of glacial till,

then intersected Huronian conglomerate from 6.5m to 18.5m, then mafic syenite to 32.5m followed by 3

interbedded phases of volcaniclastic kimberlite breccia and hypabyssal kimberlite from 32.5 m to 72.1

m. The kimberlite formation unconformably overlies a granodiorite-syenite package cored from 72.1 m to

101.2 m.

KON-21-02: This diagonal hole was planned to extend the KON kimberlite structure northwest into the

magnetic high rimming the main kimberlite discovery. The drill hole advanced through 7.1 m of glacial tills

then followed by 3 phases of interbedded volcaniclastic kimberlite breccia and hypabyssal kimberlite from

7.1 m to 42.1 m. The kimberlite formation unconformably overlies a granodiorite-syenite package cored

from 42.1 m to 116.9 m.

KON-21-03: This diagonal hole was planned to test a N/S trending magnetic low cross-cutting the magnetic

high rimming the main kimberlite discovery. The drill hole advanced through 7.0 m of glacial tills then

followed by a mafic syenite package from 7.0m to 130m. A silicified, pyritized alteration zone was

intersected from 110m to 130m explaining the magnetic low target. Gold assays are pending from the

silicified alteration zone.

KON-21-04: This vertical hole was planned to test the center of the KON kimberlite structure. The drill hole

advanced through 5.8 m of glacial tills, then intersected 6 phases of interbedded volcaniclastic kimberlite

breccia and hypabyssal kimberlite from 5.8 m to 120.1 m. The kimberlite formation unconformably overlies

a granodiorite-syenite package cored from 120.1 m to 143.2 m.

KON-21-05: This diagonal hole was planned to extend the KON kimberlite structure eastward into

the magnetic high rimming the main kimberlite discovery. The drill hole advanced through 16.5 m of glacial

tills, then mafic syenite to 94.7 m, followed by 5 phases of interbedded volcaniclastic kimberlite breccia

and hypabyssal kimberlite from 94.7 m to 250 m. The kimberlite formation unconformably overlies a

granodiorite-syenite package cored from 250 m to 253 m.

KON-21-06 is currently being drilled from the southern magnetic high rim of the anomaly due north.

Diamond results from Kon were announced July 21, 2020, which included 7 natural microdiamonds, varying

in colour, from clear to white. They were recovered from the 277 kg (611 lb) drill core sample, from 5

different kimberlite phases, which could represent separate eruptions. Three of the diamonds were chips

with a greenish tinge and the other four are white diamond chips and macles. The chips are generally flat

with one being triangular shaped, possibly a broken fragment from a larger stone. There were no inclusions

in the diamonds recovered.

Exploratory Drilling

Earlier drilling in Lorrain Township in March and April intersected mineralization that has been sent for

assay. Detailed logging indicates pyritic mineralization in several intervals from holes NL-21-02, PL-21-02

and GLH-21-01 which will be analysed for gold. Assays are pending. These drill test holes followed sampling

done in 2012 by Hubacheck and Associates, which outlined gold in a basal till dispersion train to the south

west of Paradis Pond. Two samples reported 22 and 11 gold grains with up to 6 pristine gold grains,

indicating a likely source closeby. A magnetic high alteration zone target, south of Nicol Lake, hosted in

Lorrain Granite and up-ice of the anomalous gold grains, was drill tested. Interpreted fault trends bounding

this target area were also drill tested.

Kimberlite Processing Update

RJK has utilized two kimberlite labs over the past 6 months to process a total of 12,222.5 kg of kimberlite

from 7 anomalies in Lorraine township. A mixture of diamond drill core, reverse circulation cuttings and

surface excavation were sampled and the final results from all three methods are expected by the end of

June 2021.

Peter Hubacheck comments, "In 17 months, RJK has discovered 8 new kimberlites in the Historic Cobalt

Mining Camp, including a unique type of unconsolidated, near-surface kimberlite in 7 locations,

previously not found in the Temiskaming Structural Rift Zone. To date, we have preliminary results on 2 of

the 8 kimberlites, analysed for diamonds and indicator mineral chemistry. Detailed logging of diamond drill

core and reverse circulation drill chips indicate possibly recent kimberlite eruptions occurring during the

waning stages of the Quaternary Ice Age in Lorrain Township. We require the reports from the ongoing lab

analysis to determine the diamond potential of the discoveries, and to plan future bulk sampling

programs.”

Mr. Peter Hubacheck, P. Geo., Project Manager for RJK and the Qualified Person as defined by National

Instrument 43-101 has approved the technical disclosure in this release.

Contact Information

Glenn Kasner, President and CEO

Mobile: (705) 568-7567

[email protected]

Web Site: https://www.rjkexplorations.com/

Company Information: Tel: (705) 568-7445

P.O. Box 1053, 4 Al Wende Avenue, Kirkland Lake, ON P2N 3L1 Tel: (705) 568-7956

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the

policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

Forward Looking Information

This news release includes certain forward-looking statements, which may include, but are not limited to,

statements concerning future mineral exploration and property option payments. Any statements

contained herein that are not statements of historical facts may be deemed to be forward-looking,

including those identified by the expressions “will”, “anticipate”, “believe”, “plan”, “estimate”, “expect”,

“intend”, “propose” and similar expressions. Forward-looking statements involve known and unknown risks

and uncertainties that could cause actual results, performance, or achievements to differ materially from

those expressed or implied in this news release. Factors that could cause actual results to differ materially

from those anticipated in this news release include, but are not limited to, the financial resources of the

Corporation being inadequate to carry out its stated plans. RJK assumes no obligation to update the

forward-looking statements or to update the reasons why actual results could differ from those reflected in

the forward-looking statements except as required by applicable law.