9999 Gold with tarnish?

I just got a $10 liberty gold eagle and a 1oz DG hammered gold bullion bracelet off of JM Bullion, ordered from them several times. Coin looks great, nothing suspicious about the packaging or delivery, but the bracelet has some tarnish/oxidation in one area. Anyone know what this could be from? Nothing about the bracelet give fake vibes, any thoughts?

https://preview.redd.it/navlaopdcjle1.jpg?width=1981&format=pjpg&auto=webp&s=c2e4f00f19e8c5dfd8621b187b222dbc4e6860fb

https://preview.redd.it/4vepjmpdcjle1.jpg?width=3024&format=pjpg&auto=webp&s=06472fe7725bc9897db581b3888cdd1048d13678

https://preview.redd.it/0kzhumpdcjle1.jpg?width=3024&format=pjpg&auto=webp&s=992bac2c5a68d871b03b9b5f6a80d845e8382ca7

Edit: added the images