Thorin Oakenshield and the Obsession with Arkenstone

Thorin Oakenshield's obsession with the Arkenstone, the Heart of the Mountain, is a central and tragic force in the latter part of The Hobbit, driving his actions, corrupting his judgment, and ultimately leading to his death. This single gem, more than the entire dragon-hoard, comes to embody his identity as the rightful King under the Mountain, and his inability to part with it or see it used as a bargaining chip precipitates the siege of the Mountain, the near-battle with the Elves and Men, and his final, fatal sortie.

The Arkenstone as the Symbol of Kingship

Long before the treasure is reclaimed, the Arkenstone is established as the supreme object of desire within the hoard. Thorin, half-dreaming in the dark of the tunnel, murmurs its description: "It was like a globe with a thousand facets; it shone like silver in the firelight, like water in the sun, like snow under the stars, like rain upon the Moon!" This poetic reverence marks it not as mere wealth but as the heirloom of his house, the physical embodiment of his lineage and his claim to the throne. The dwarves' song, sung in Bilbo's hobbit-hole, had already spoken of the desire for "the pale enchanted gold" and the harps and gold of their ancestors, but the Arkenstone represents a more personal, dynastic prize. It is the one item Thorin names unto himself above all others, declaring it "worth more than a river of gold in itself, and to me it is beyond price." This declaration, made to his own company, reveals that his quest has become as much about reclaiming this symbolic heart as it is about avenging his people's dispossession.

The Obsession Takes Hold

Once inside the treasure-hoard, the lust for gold, which a dragon has long brooded upon, begins to work on Thorin. The narrator notes that "long hours in the past days Thorin had spent in the treasury, and the lust of it was heavy on him." Though he hunted chiefly for the Arkenstone, his eye fell on many other wonderful things, and the old memories of his race's labours and sorrows wound about them. This obsession directly corrupts his political judgment. When Bard, the dragon-slayer and heir of Girion, comes to parley, making the just claim that the treasure of Dale is mingled with the hoard and that the Lake-men deserve recompense for their aid and their ruin, Thorin refuses. He will not even discuss the matter with an armed host at his gate, and his reply is haughty and unyielding: "Nothing will we give, not even a loaf's worth, under threat of force." The Arkenstone is not mentioned in this first parley, but its absence from his possession—and his fear of losing it—is the unspoken foundation of his intransigence.

The Betrayal and the Breaking Point

The obsession reaches its crisis when Bilbo, acting on his own conscience, gives the Arkenstone to Bard and the Elvenking to use as a bargaining chip. When the jewel is presented before the Gate, Thorin is "stricken dumb with amazement and confusion." His reaction is immediate and volcanic. He turns on Bilbo, calling him a "miserable hobbit" and an "undersized—burglar!" and physically seizes him, threatening to throw him to the rocks. The depth of his rage is a measure of the stone's power over him. Even when Gandalf intervenes, Thorin's mind is already working on a darker path: "so strong was the bewilderment of the treasure upon him, he was pondering whether by the help of Dain he might not recapture the Arkenstone and withhold the share of the reward." The obsession has transformed him from a proud but honorable leader into a figure willing to break his word and risk war for a single gem. He agrees to trade a fourteenth share of the hoard for the stone, but the agreement is made in bad faith, a mere tactic to buy time until Dain's army arrives.

The Final Reckoning and Redemption

Thorin's obsession is ultimately the cause of his death. The standoff over the Arkenstone and the treasure leads directly to the encirclement of the Mountain and the arrival of Dain's dwarves, which in turn triggers the Battle of the Five Armies when the Goblins and Wargs attack. Thorin leads a desperate sortie from the Gate, wielding his axe with mighty strokes, but he is overwhelmed and falls, pierced with many spears. In his final moments, however, the obsession breaks. Lying wounded, he speaks to Bilbo: "Farewell, good thief... I go now to the halls of waiting to sit beside my fathers, until the world is renewed. Since I leave now all gold and silver, and go where it is of little worth, I wish to part in friendship from you, and I would take back my words and deeds at the Gate." He acknowledges that his pursuit of hoarded gold was a mistake, valuing instead "food and cheer and song." This deathbed reconciliation redeems him, but the cost of his obsession is final. After his death, Bard lays the Arkenstone upon Thorin's breast in his tomb deep beneath the Mountain, saying, "There let it lie till the Mountain falls!" The stone that had consumed his life becomes his eternal companion in death, a symbol of the dynasty he restored but could not live to rule.