Salamander Tail

A Salamander Tail is a piece of forgeable material in Golden Sun: The Lost Age. It is described as "A fiery lizard's tail". It is found in various areas after the Great Western Sea is accessed, such as in Magma Rock, and it can also be dropped rarely from a Pyrodra in Treasure Isle (fell it with Mars Djinn to increase drop rate by four times). Being an Artifact, it can be sold and later repurchased. It can be bought for 1400 coins and sold for 1050 coins. It can be forged into the following quite powerful equipment, all Mars-based:

Apollo's Axe: Axe class: Attack +158: Unleashes Flare Burst, which converts to Mars damage, adds 56 attack points, and adds all of the damage done to the user’s own HP. It is bought for 15200 coins and sold for 11400 coins. The chance of it being forged is 15%. Ardagh Robe: Robe class: Defense +44: Mars power +20: Mars resist +40. It is bought for 9900 coins and sold for 7425 coins. The chance of it being forged is 25%. Burning Sword: Light Blade class: Attack +157: Unleashes Blaze Rush, which converts to Mars damage, adds 54 attack points, and cuts enemy defense by 25%. It is bought for 14600 coins and sold for 10950 coins. The chance of it being forged is 15%. Flame Shield: Shield class: Defense +44: Mars resist +60. It is bought for 8600 coins and sold for 6450 coins. The chance of it being forged is 25%. Salamander Rod: Staff class: Attack +156: Unleashes Fire Dance, which converts to Mars damage, adds 51 attack points, and cuts enemy attack by 25%. It is bought for 14300 coins and sold for 10725 coins. The chance of it being forged is 20%.

Analysis
The weapons forged out of Salamander Tails are not endgame-relevant, but the Ardagh Robe and Flame Shield may have more of a specific appeal in the long run.