This is a large jar of carbide for use in miner's lamps, etc. It was recovered from an old mine in Nevada in the 1980's and has been sealed in this jar since then. It is between 10 - 11 lbs of carbide. I've used a bit of it myself, and that's what is running the lamp in the picture (the lamp is not for sale - just the carbide).
Please reply by email with a phone number and some words to let me know that you know what to do with this stuff, and not some robo email miner.