Huge spiky orikalkum salvage was a salvage item introduced with the second Mining and Smithing beta. Salvage has no use other than disassembly, alchemy, or trading.
Huge spiky orikalkum salvage would have been worth 125,000 coins in high level alchemy.
Although orikalkum salvage was not obtainable by any means, the items were listed in the game cache during the beta as a placeholder in the event that drops of this value were to be released. Orikalkum salvage was not included in the final release of the Mining and Smithing rework.