Philosopher's Stone
From WikiRaider
The Philosopher's Stone was one of the first artefacts Lara was after. In Tomb Raider Chronicles Lara travels to Rome to search for it. The stone lay within the Philosopher's Gate that could only be unlocked by retrieving the God Stones, and defeating the Stone Serpents that guarded it.
Lara tried to remove the stone from its resting place in a wall of gold. The platform she was standing on gave way, and she was cast into a long tunnel that led to the catacombs of The Colosseum. Lara then found another way back into the temple through the Colosseum. She made another more successful attempt to remove the stone using a crowbar.
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The stone upon contact would turn other metals into pure gold. The wall it was embedded in, was already made of gold when Lara removed the stone.
