Discovered by a sports diver on the South Coast of Oʻahu, near Maunalua Bay around 30 years ago.

“The kilo pohaku of the Hawaiians were most ingenious.  Some native Narcissus admiring his face in some placid pool may have caught the suggestion and wiser than the beloved Echo,

instead pining away for love of the intangible image, devised a means of recalling this image at pleasure.  Whoever may have been the lucky inventor, the results as we have them today are certain well-ground circular disks, less than half an inch thick, and the diameter varying . . . These were not highly polished and do not in the least reflect when in a ry condition, so their properties would be concealed from the causal observer, but placed in a shallow calabash of water the dark background of the sone gives back a sufficiently clear reflection.  I have never seen any of these mirrors other than circular form.  They rapidly disappeared from use with the advent of European glass mirrors* and their use was soon forgotten.  in the native kahuna lapaʻa u practice they are occasionally used as a cooling application to furunculi or other  ulcerous sores, and for this use holes are often bored near the edge through which a cord could be passed.  I know of no other sub-civilized people who have adopted this ingenious conception.  Specimens are no longer common.  The stone is sort of a bassinet, quite as compact as the phonolite used for adzes, and it is of a uniformly dark color in all the examples noted.  It is supposed to come from the uplands of Mauna Kea of Hawaii.

*There is in the Bishop Museum a strip of “silvered” glass given by Vancouver to Kamehameha to which has been fitted a neat frame of native wood: similar mirrors, but of smaller size were attached to handkerchiefs by Hawaiian women, much like the fashion of attaching small mirrors to folding fans, once in vogue among the white ladies”  William Brigham, Stone Implements and Stone Work of the Ancient Hawaiians, Bishop Museum, 1902 pp. 66-67