100+
Downloads
Content rating
Everyone
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About this app

Did you know that you can confirm the authenticity of your jewelry on your cell phone? Assay Office brings the oldest form of consumer protection into the digital age! Only with the hallmark, placed on each piece, the customer is guaranteed the type and quantity of precious metal contained in the jewelry they purchase. Now, through the Contrastaria App, everything is easier! It can confirm the certification of precious metals contained in goldsmith and jewelry articles, preventing counterfeiting and promoting legitimate trade.
Updated on
Oct 8, 2025

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
No data collected
Learn more about how developers declare collection

What’s new

- A nova versão apresenta correção de bugs e melhorias de desempenho

App support

Phone number
+351217810870
About the developer
Imprensa Nacional - Casa da Moeda, SA
incm@incm.pt
Edifício Casa da Meoda Av. de António José de Almeida 1000-042 Lisboa Portugal
+351 21 781 0868

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