Abstract: In order to produce a chrysoberyl single crystal displaying a luminous band effect, a mixture of a principal component consisting of beryllium oxide and aluminum oxide in nearly equal molar amounts with small amounts of titanium oxide and coloring metal oxide is sintered or melted and solidified in a non-oxidizing gas atmosphere to provide a raw material bar; the raw material bar is heated in a non-oxidizing gas atmosphere by means of a light condense-heating type floating zone method to grow a chrysoberyl single crystal; and the single crystal is heated so as to allow needle crystals of titanium oxide to be deposited in one orientation in the chrysoberyl single crystal.