Certifications

COQUINE pieces are crafted in compliance with all quality standards, made of 925 sterling silver with gold or rhodium plating, and are duly certified by INCM’s Assay Offices.

The INCM Assay Offices provide this guarantee by verifying the legal standard (the proportion of precious metal in an alloy) and applying it alongside the responsibility mark, manufacturer’s mark, or equivalent. The application of these marks is only mandatory for silver pieces weighing more than 2 grams, with legal marks from the Portuguese Assay Office.

In case of doubt regarding the authenticity of the marks, customers may contact the Assay Office services for verification.

For information on the daily rates of gold, silver, platinum, and palladium, please refer to the website of the Bank of Portugal.