1.54 ct round diamond

i bought a 1.54 ct round modified brilliant diamond color is H,clarity SI1 polish/symmetry very good/ very good,proportions excellent,measurements 7.42-7.46×4.52mm,table 58.5%,crown 13.5%,pavilion 43.5%, cutlet pointed,girdle thin to medium (faceted) fluorescence none,and why would this diamond have very little fire ? It also has 89 facets.Thank you