Feasibility of Photoelectric Sorting of Celestite
					Celestine is a crystal with a chemical composition of SrSO4, belonging to the orthorhombic (orthorhombic) system of sulfate minerals. It is the most important strontium-containing mineral in nature, and its colors include blue, green, yellow-green, orange, light blue-gray, etc., and sometimes it is...
										   - Jan 08, 2025