§ Of Eldamar and the Princes of the Eldalië The Silmarillion

Manwë and Varda loved most the Vanyar, the Fair Elves; but the Noldor were beloved of Aulë, and he and his people came often among them. Great became their knowledge and their skill; yet even greater was their thirst for more knowledge, and in many things they soon surpassed their teachers. They were changeful in speech, for they had great love of words, and sought ever to find names more fit for all things that they knew or imagined. And it came to pass that the masons of the house of Finwë, quarrying in the hills after stone (for they delighted in the building of high towers), first discovered the earth-gems, and brought them forth in countless myriads; and they devised tools for the cutting and shaping of gems, and carved them in many forms. They hoarded them not, but gave them freely, and by their labour enriched all Valinor.