Calliostoma trotini is a species of sea snail, a marine gastropod mollusc in the family Calliostomatidae.

[3] It is also found in the East China Sea.

This top shell lives at depths of about 150 m.[3] The shell is elevated and glossy, conical with straight whorls.

[3] Overall color is light olive with a purplish iridescent shine.

[3] There are darker blotches just above the suture, on the periphery.