Gem Assist

Apparently they are made with semi-precious stones, Amethyst, Agate, etc., is really cute. I also bought a set of napkin rings as gifts with small groups attached.
The Winery I bought does have more in stock, and lost contact with the company that sold them.
Can anyone help please?

You can check with your nearest consulate of Brazil, they might be able to put you in contact with a local importer, or at least the Brazilian supplier. It would be a first step. Otherwise, a distributor of gifts could help.