The Arkenstone (or Heart of the Mountain) of Thrain was a wondrous gem sought by Thorin Oakenshield in J. R. R. Tolkien's The Hobbit. It was discovered beneath Erebor (the Lonely Mountain) by Thorin's ancestor Thrain and shaped by the Dwarves. The Arkenstone became the family heirloom of Durin's folk, but was lost when the dragon Smaug captured the mountain from the Dwarves. The Arkenstone shone of its own inner light, but having been cut and fashioned by the Dwarves, it also reflected and multiplied any light glancing upon its surface with marvelous beauty. This is a disambiguation page — a navigational aid which lists other pages that might otherwise share the same title. ... In J. R. R. Tolkiens Middle-earth legendarium, Thorin Oakenshield was a Dwarf, the son of Thráin II and the grandson of King Thrór. ... J. R. R. Tolkien in 1972, in his study at Merton Street (from by H. Carpenter) John Ronald Reuel Tolkien (January 3, 1892 – September 2, 1973) is best known as the author of The Hobbit and its sequel The Lord of the Rings. ... The trip taken in The Hobbit in middle earth shown in red The Hobbit is a childrens story written by J. R. R. Tolkien in the tradition of the fairy tale. ... In J. R. R. Tolkiens Middle-earth legendarium, the Lonely Mountain (Sindarin Erebor) is a mountain in the northeast of Rhovanion. ... The Dwarves of J. R. R. Tolkiens fictional universe of Middle-earth are beings of short stature who all possess beards, and are often friendly with Hobbits although long suspicious of Elves. ... In J. R. R. Tolkiens fictional universe of Middle-earth, Durins folk is the most important folk of Dwarves. ... J. R. R. Tolkiens universe of Middle-earth features dragons closely based on those of European legend. ... For the MUD of this name, see SMAUG. In the fiction of J. R. R. Tolkien, Smaug was a greedy, reddish-gold dragon of Middle-earth, who laid waste to Dale and captured the Lonely Mountain (Erebor) with all its treasure, which he gathered in a central hall and slept... This page is about a mythological race. ...

When Bilbo Baggins found it on Smaug's golden bed deep inside the Lonely Mountain, he pocketed it, having learned how much Thorin valued it. While the Dwarves with Thorin sorted the treasure, Thorin sought only the Arkenstone, unaware that Bilbo was hiding it in his pillow. When the Dwarves refused to share any of the treasure with King Thranduil and Bard, who had killed Smaug the Magnificent, Bilbo crept out of the Dwarves' fort inside the Mountain, and gave them the Arkenstone; Bard, Thranduil, and Gandalf then tried to trade it for Bilbo's fourteenth share of Smaug's hoard. The dispute was interrupted by an evil army arriving from the Grey Mountains, the Battle of Five Armies ensued, and Thorin was killed. The Arkenstone, and the great sword Orcrist, was placed on Thorin's chest when he was buried deep under Erebor. Bilbo Baggins is the central character in the J. R. R. Tolkien novel The Hobbit, and a minor character in its sequel, The Lord of the Rings. ... King Thranduil was a character in the fictitious world of Middle-earth created by J. R. R. Tolkien. ... A fictional character in The Hobbit by J. R. R. Tolkien, Bard the Bowman of Esgaroth was one of the most skilled archers among Men, and the heir of Girion, the last king of old Dale. ... For the MUD of this name, see SMAUG. In the fiction of J. R. R. Tolkien, Smaug was a greedy, reddish-gold dragon of Middle-earth, who laid waste to Dale and captured the Lonely Mountain (Erebor) with all its treasure, which he gathered in a central hall and slept... Gandalf is a fictional character from J. R. R. Tolkiens universe, Middle-earth. ... In the fiction of J. R. R. Tolkien, the Ered Mithrin or Grey Mountains was a large mountain range to the north of Rhovanion. ... The Battle of Five Armies is a battle depicted in The Hobbit by J. R. R. Tolkien. ... Orcrist is a noted sword mentioned in the fiction of J.R.R. Tolkiens Middle-earth. ...