June 30, 2026

  ​ ​ ​

Antimony

  ​ ​ ​

Zeolite

  ​ ​ ​

All Other

  ​ ​ ​

Total

Plant and equipment

​

$

18,351,015

​

$

7,113,783

​

$

3,474,017

​

$

28,938,815

Buildings

​

2,288,612

​

1,705,893

​

5,619,396

​

9,613,901

Mineral rights and interests

​

—

​

16,753

​

8,710,383

​

8,727,136

Land

​

2,083,094

​

—

​

2,009,598

​

4,092,692

Construction in progress

​

16,499,377

​

941,626

​

297,243

​

17,738,246

Total property, plant and equipment

​

39,222,098

​

9,778,055

​

20,110,637

​

69,110,790

Accumulated depreciation

​

(10,676,530)

​

(4,375,476)

​

(609,570)

​

(15,661,576)

Property, plant and equipment, net

​

$

28,545,568

​

$

5,402,579

​

$

19,501,067

​

$

53,449,214

December 31, 2025

  ​ ​ ​

Antimony

  ​ ​ ​

Zeolite

  ​ ​ ​

All Other

  ​ ​ ​

TOTAL

Plant and equipment

​

$

14,814,441

​

$

7,031,403

​

$

487,751

​

$

22,333,595

Buildings

​

1,106,303

​

1,705,893

​

3,111,073

​

5,923,269

Mineral rights and interests

​

—

​

16,753

​

6,107,085

​

6,123,838

Land

​

2,083,094

​

—

​

1,530,782

​

3,613,876

Construction in progress

​

19,071,013

​

45,000

​

—

​

19,116,013

Total property, plant and equipment

​

37,074,851

​

8,799,049

​

11,236,691

​

57,110,591

Accumulated depreciation

​

(10,278,230)

​

(4,146,457)

​

(311,065)

​

(14,735,752)

Property, plant and equipment, net

​

$

26,796,621

​

$

4,652,592

​

$

10,925,626

​

$

42,374,839