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Avalon Reports Drill Results from 2022-2023 Exploration Program at Separation Rapids

Drill Results

Avalon Reports Drill Results from 2022-2023

Exploration Program at Separation Rapids

Toronto, Ontario--(Newsfile Corp. - June 1, 2023) -

Avalon Advanced Materials Inc.

(TSX: AVL)

(OTCQX: AVLNF) ("Avalon" or the "Company") is pleased to announce final assays from the 2022-2023

drilling program at the Company's flagship Separation Rapids Lithium Project, confirming potential to

significantly expand its lithium resource at depth. New significant intercepts shown below are from three

of the four final drill holes.

SR23-85: 1.56% Li

2

O over 47.71 metres ("m")

SR23-91: 1.06% Li

2

O over 10.38m and 1.66% Li

2

O over 7.01m and 1.36% Li

2

O over 10.61m

SR23-92: 1.47% Li

2

O over 3.42m and 1.14% Li

2

O over 4.35m and 1.49% Li

2

O over 4.52m

The assays for drill hole SR23-93 (the fourth hole) have confirmed the petalite mineralization to 566-

metre depth increasing the potential depth of the deposit by 80%. The drilling has also confirmed that the

deposit is open to the east and west, and to depth, over a 300-strike length, with similar grades to the

current mineral resource estimate, supporting a conceptual target to double the size of the deposit

through future drilling.

"These drill results truly demonstrate what our team has always believed - the resource at Separation

Rapids is potentially much larger than what is currently understood," commented Rickardo Welyhorsky,

Chief Operating Officer at Avalon. "I am extremely excited to begin the next drilling program to reveal its

true potential."

Drilling Program Final Assay Details

The 2022-2023 drill program consisted of 12 drill holes on the existing resource and one vertical drill

hole on the centre of the deposit; all 13 holes totalled 4,179m and was designed to examine the potential

to expand mineralization to the east and west as well as the depth extent.

Hole SR23-85 (see Figure 1) was one of six targeting either gaps in existing drilling (for 85) or below the

current mineral resource estimate, with hole SR23-85 intercepting 1.56% Li

2

O over 47.7m (estimated

true width). As a result, all six holes (SR23-81 to SR23-86) confirm that the deposit is open to depth. All

drill holes will be used to update the existing mineral resource estimate, which is currently underway.

Drill hole SR23-93 was drilled vertically to test the depth extent of the deposit (see Figure 2). This hole

was terminated at 570m due to weather constraint and the start of early spring breakup. SR23-93

assays returned 1.51% Li

2

O over 565m (drilled width) confirming the previous report of visual petalite

mineralization to depth. This extends the depth of the deposit by 249m from the previously reported

deepest intercept at 315m (drilled in 2017) below surface. The grade of the lower half of hole SR23-93

returned 1.48% Li

2

O over 244.45m (from 321.6m to 566.10m) (see Table 1), which indicates that the

mineralization continues at a virtually identical grade to the current mineral resource estimate.

The two holes (SR23-91 and SR23-92) that were drilled in a gap on the western part of the deposit have

confirmed the extension and openness of the deposit to the west with intercepts of cumulative about 27m

(estimated true width) in hole SR23-91 and cumulative 12 metres in hole SR23-92. They have also,

similar to hole SR23-85, potentially improved and expanded the mineralized area.

All drill hole data has been brought into Avalon's database and resource block model in order to develop

an independent updated resource estimate for the deposit.

"As a consequence of our refreshed strategic plan, we are delivering on key milestones and

accelerating developments at Separation Rapids," noted Zeeshan Syed, President of Avalon. "Ontario

continues to be well positioned as an international economic hub within the critical minerals value chain

and Avalon is poised for growth to help support that important mandate."

Future Drilling at Separation Rapids

The recent drill program indicating the significant resource expansion potential is an encouragement for

very significant future drilling program in order to both increase the inferred resources and upgrade

inferred and indicated resources to indicated and measured categories. Such a program may be

between 10,000m and 30,000m. The results of the recent program suggest a conceptual exploration

target of doubling the existing resource estimate at similar lithium grades. This may be between 15 and

20 million tonnes at 1.2 to 1.6% Li

2

O. At present there is insufficient drilling

below

the recent holes

SR23-81 to SR23-92 to delineate a resource and it is uncertain that a deeper resource will be

delineated.

This news release was reviewed by the Dr. Bill Mercer, P. Geo. (ON). Dr. Mercer is a qualified person

for the purposes of National Instrument 43-101, who has reviewed and approved the technical

information included in this news release.

About Avalon Advanced Materials Inc.

Avalon Advanced Materials Inc. is a Canadian mineral development company specializing in niche

market metals and minerals with growing demand in new technology. The Company has three advanced

stage projects, all 100%-owned, providing investors with exposure to lithium, tin and indium, as well as

rare earth elements, tantalum, niobium, and zirconium. Avalon is currently focusing on its Separation

Rapids Lithium Project, Kenora, ON and its East Kemptville Tin-Indium Project, Yarmouth, NS. Social

responsibility and environmental stewardship are corporate cornerstones.

For questions and feedback, please e-mail the Company at

[email protected]

, or phone Zeeshan

Syed, President at 416-364-4938.

This news release contains "forward-looking statements" within the meaning of the United States

Private Securities Litigation Reform Act of 1995 and applicable Canadian securities legislation.

Forward-looking statements include, but are not limited to, that there is potential to significantly

expand its lithium resource at depth, that there is support for a conceptual target to double the size of

the deposit through future drilling, that the resource at Separation Rapids has the potentially to be

much larger than what is currently understood, that certain drill holes will be used to update the

existing mineral resource estimate, that the recent drill program indicating the significant resource

expansion potential is an encouragement for very significant future drilling program in order to both

increase the inferred resources and upgrade inferred and indicated resources to indicated and

measured categories, that such a program may be between 10,000 to 30,000 metres, that the results

of the recent program suggest a conceptual exploration target of doubling the existing resource

estimate at similar lithium grades, that this may be between 15 and 20 million tonnes at 1.2 to 1.6%

Li

2

O.

Generally, these forward-looking statements can be identified by the use of forward-looking

terminology such as "potential", "scheduled", "anticipates", "continues", "expects" or "does not

expect", "is expected", "scheduled", "targeted", "planned", or "believes", or variations of such words

and phrases or state that certain actions, events or results "may", "could", "would", "might" or "will be"

or "will not be" taken, reached or result, "will occur" or "be achieved". Forward-looking statements are

subject to known and unknown risks, uncertainties and other factors that may cause the actual results,

level of activity, performance or achievements of Avalon to be materially different from those

expressed or implied by such forward-looking statements. Forward-looking statements are based on

assumptions management believes to be reasonable at the time such statements are made.

Although Avalon has attempted to identify important factors that could cause actual results to differ

materially from those contained in forward-looking statements, there may be other factors that cause

results not to be as anticipated, estimated or intended. Factors that may cause actual results to differ

materially from expected results described in forward-looking statements include, but are not limited

to market conditions, and the possibility of cost overruns or unanticipated costs and expenses as well

as those risk factors set out in the Company's current Annual Information Form, Management's

Discussion and Analysis and other disclosure documents available under the Company's profile at

www.SEDAR.com

. There can be no assurance that such statements will prove to be accurate, as

actual results and future events could differ materially from those anticipated in such statements.

Such forward-looking statements have been provided for the purpose of assisting investors in

understanding the Company's plans and objectives and may not be appropriate for other purposes.

Accordingly, readers should not place undue reliance on forward-looking statements. Avalon does not

undertake to update any forward-looking statements that are contained herein, except in accordance

with applicable securities laws.

Figure 1: North-South Drill Section, Separation Rapids Lithium Deposit

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

https://images.newsfilecorp.com/files/3386/168339_33b26edfa46ecbbc_002full.jpg

Figure 2: West-East Long Section, Separation Rapids Lithium Deposit

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

https://images.newsfilecorp.com/files/3386/168339_33b26edfa46ecbbc_003full.jpg

Table 1: Significant drill intersections

Drill hole

From (m)

To (m)

Drilled Width

(m)

Estimated True

Width (m)

Li2O %

SR-22-81

325.00

371.50

46.50

19.65

1.69

SR-23-82

336.00

367.70

31.70

11.36

1.50

and

378.10

390.80

12.70

4.55

1.66

and

397.35

412.75

15.40

5.52

1.10

SR-23-83

269.45

321.80

52.35

17.90

1.35

and

357.75

380.60

22.85

7.82

0.99

SR-23-84

187.00

410.00

223.00

76.27

0.96

including

203.00

321.25

118.25

40.44

1.46

SR-23-85

158.00

275.30

117.30

47.71

1.56

SR-23-86

167.25

300.00

132.75

45.40

1.01

and

216.00

248.90

32.90

11.25

1.53

and

274.40

300.00

25.60

8.76

1.92

SR-23-87

40.10

54.80

14.70

7.35

1.16

and

62.30

72.00

9.70

4.85

0.95

SR-23-88

84.25

93.00

8.75

4.38

1.13

SR-23-89

7.00

17.00

10.00

5.74

1.69

and

47.55

52.05

4.50

2.58

1.44

SR23-90

13.15

36.35

23.20

9.80

1.76

and

69.00

73.35

4.35

1.84

1.54

SR23-91

67.40

83.55

16.15

10.38

1.06

and

91.10

102.00

10.90

7.01

1.66

and

110.50

127.00

16.50

10.61

1.36

SR23-92

42.80

50.90

8.10

3.42

1.47

and

61.00

71.30

10.30

4.35

1.14

and

77.10

87.80

10.70

4.52

1.49

SR23-93

1.25

566.10

564.85

NA

1.51

Including

321.65

566.10

244.45

NA

1.48

Notes to TABLE 1:

1

.

True widths are estimated assuming the mineralized zones are vertical and true width is horizontal.

The near vertical nature is clearly apparent in drill sections. "NA" indicates for the vertical hole that

the mineralization width is not known.

2

.

For interval calculations a cutoff grade of 0.50% Li2O was utilized which is similar to that used in

previous resource estimates. Mineralized intervals with overall grades considerably below 1%

Li2O are not quoted.

3

.

All drill core was split by Avalon staff on site near Kenora and shipped to ALS Global in Thunder

Bay for preparation and on to ALS Vancouver for analysis by methods ME-MS81, ICP-06, and

ME-4ACD81for multielement analysis including Li, Ta, Cs and Rb.

4

.

Some drill core samples had lithium values overlimits for the initial analytical method (>10.000ppm

Li) and were reanalysed utilizing ALS method ME-ICP82b.

As a result, some intervals increased in

grade from those announced in News Release 23-04.

5

.

Avalon inserted company certified lithium standards and blanks into the sample stream for QAQC

purposes.

The results of the Avalon and laboratory standards and blanks were reviewed for

acceptance by the QP, Dr. Bill Mercer, P. Geo. (ON), qualified person for the purposes of National

Instrument 43-101, prior to accepting the laboratory results.

6

.

Lithium (Li) analyses in ppm were converted to Li

2

O values by multiplying by 2.1527.

7

.

The drill program was supervised in the field by J.C.Pedersen (P.Geo) and A. Meek (P.Geo).

To view the source version of this press release, please visit

https://www.newsfilecorp.com/release/168339