Στα τέλη του 19ου αιώνα, scientists have successfully produced artificial emeralds using the flux method. They put the raw material of beryl, adding a small amount of coloring agent chromium oxide and flux (such as lithium molybdate and lithium barium oxide), και τα λοιπά., into a large crucible made of platinum, heated to 800°C, smelted […]
