Source: Fourth Age... and after.
Disclaimer: Tolkien’s imaging... Kortirion’s extrapolation.
Notes:...And thus it came to pass that the Silmarils found their long homes: one in the airs of heaven, and one in the fires of the heart of the world, and one in the deep waters.
‘...Singing in pain and regret beside the waves’, that was written of me. Maedhros was supposed to have thrown himself into a fiery chasm in despair – finding the oath we’d sworn and killed for so diligently was in vain certainly shook him... but hanging above Thangorodrim and losing a hand had taught him pragmatism.
He gave to the fire what was born of fire and walked away. I hurled mine as far as I could... but memories linger in the evening skies... Our lives now are the epitome of persistent endeavour – being immortal is simply having the diligence to survive.