Target pellets of four types of olivine after laser irradiations. Each pellet is 13 mm in diameter and 2 mm in thickness. The four olivine types are Fa₂₉ (a–e), Fa₅₀ (f–j), Fa₇₁ (k–o), and Fa₁₀₀ (p–t). The five irradiation energies used were P5mJ (first row), P25mJ (second row), P75mJ (third row), M75mJ (fourth row), and M150mJ (fifth row). The dark spots lined up in a matrix on each pellet are the laser irradiation spots (0.5 mm in diameter), and the light-tone area is the initial state of the olivine. The initial color of the pellets became darker with increasing Fa# values. After irradiation, the color of the irradiation spots became substantially darker. In addition, the color tones became darker as the total energies increased.