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PROPERTY, PLANT AND EQUIPMENT, NET AND MINERAL RIGHTS
 3 Months Ended
Mar. 31, 2023
Property, Plant and Equipment [Abstract]  
PROPERTY, PLANT AND EQUIPMENT, NET AND MINERAL RIGHTS PROPERTY, PLANT AND EQUIPMENT, NET AND MINERAL RIGHTS
 
Properties, plant and equipment at March 31, 2023 and December 31, 2022 include the following:
 
 March 31, 2023December 31, 2022
Land$6,328,338 $6,328,338 
Real property leased to third parties1,037,049 1,037,049 
Property, plant and equipment for mineral processing27,644,745 27,644,745 
Other property and equipment5,270,355 5,212,891 
Accumulated depreciation(26,869,026)(26,748,929)
Total property, plant and equipment, net$13,411,461 $13,474,094 
 
During the three months ended March 31, 2023 and March 31, 2022, we recognized depreciation expense of $120,097 and $137,816, respectively.

Mineral Rights and Properties

Our properties at March 31, 2023 and December 31, 2022 consisted of the following:
 
March 31, 2023December 31, 2022
Comstock Mineral Estate$12,164,013 $12,164,013 
Other mineral properties317,405 317,405 
Water rights820,595 90,000 
Total mineral rights and properties$13,302,013 $12,571,418 

The Comstock Mineral Estate includes all of the Company's resource areas and exploration targets. During the three months ended March 31, 2023 and 2022, we did not record any depletion expense, as none of the properties are currently in production. All of our mineral exploration and mining lease payments are classified as selling, general and administrative expenses in the condensed consolidated statements of operations.

During the three months ended March 31, 2023, the Company acquired senior water rights (50 acre feet) and junior water rights (16 acre feet) on one of its existing properties for $730,595.