Unable to say they are sterling but they just have a really cool color and vibe to them. Likely fairly vintage c.1970s or older. Only stamp mark is “Mexico” on the back of each.

Not magnetic. See photos with comparison in size to a US Dime.

Buy them for their look, not for the silver content.

Will ship USPS with tracking and if you have read this far, we will also offer free shipping just so someone can enjoy them at a better price.