Property, Plant, and Equipment

12 Months Ended

Dec. 31, 2025

Property, Plant, and Equipment [Abstract]

Property, Plant and Equipment

Note 10.  Property, Plant, and Equipment

The major categories of property, plant, and equipment and accumulated depreciation and depletion are presented below:

	December 31,
(in millions of dollars)		2025			2024
Mineral rights and reserves	$	560.9		$	560.0
Land		48.9			43.0
Buildings		211.9			202.0
Machinery and equipment		1,272.9			1,236.4
Furniture and fixtures and other		155.2			144.5
Construction in progress		59.1			50.7
		2,308.9			2,236.6
Less: accumulated depreciation and depletion		(1,283.9	)		(1,246.9	)
Property, plant and equipment, net	$	1,025.0		$	989.7

For the years ended December 31, 2025 and 2024, the Company recorded a net gain of $5.6 million and $12.3 million, respectively for the sale of refractories manufacturing assets in China. In addition, for the year ended December 31, 2025, the Company recorded a net gain of $4.3 million related to the sale of our chromite mine in South Africa.

For the year ended December 31, 2025, the Company recorded a $4.7 million charge in restructuring and other items for the write-down of assets relating to the consolidation and shutdown of facilities.

Depreciation and depletion expense for the years ended December 31, 2025, 2024, and 2023 was $75.2 million, $79.5 million, and $79.4 million, respectively.