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PROPERTY, PLANT AND MINE DEVELOPMENT
 3 Months Ended
Mar. 31, 2022
Property, Plant and Equipment [Abstract]  
PROPERTY, PLANT AND MINE DEVELOPMENT PROPERTY, PLANT AND MINE DEVELOPMENT
Property, plant and mine development, net, is presented in the following table:
March 31,
2022		December 31,
2021
Mining interests$44,482,570 $39,303,043 
Mine development1,301,099 — 
Land688,829 688,829 
Facilities and equipment113,252 107,248 
Construction in process1,595,695 — 
Property, plant, and mine development48,181,445 40,099,120 
Accumulated depreciation(48,828)(43,766)
Property, plant, and mine development, net$48,132,617 $40,055,354 
Depletion of mine development and mining interests does not commence until the assets are placed in service. As of March 31, 2022, we have not recorded depletion expense for any of our mine development or mining interests assets.
Depreciation expense was $5,062 and $1,376 for the three months ended March 31, 2022 and 2021, respectively, and was recorded to depreciation expense in “General and administrative expenses” in our consolidated statements of operations.