Enerdhil
Enerdhil is described as a lover of all that that grew green in the world. He ever desired to see the sunlight through the leaves of the trees, so he created a great green gem which was beloved by all who looked through it.
Biography
Enerdhil is described as a lover of all that that grew green in the world. He ever desired to see the sunlight through the leaves of the trees, so he created a great green gem which was beloved by all who looked through it. He apparently gave it to Idril, who in turn gave it to her son Eärendil; from there it is said that it went over the sea with Enerdhil.
Other versions of the legendarium
In earlier versions of the Middle-earth legendarium, the "Elessar gem" was made not by Enerdhil but by Celebrimbor, son of Curufin of Eregion.