Welcome to the Duonas Corp. We are a Company owned business operating out of Rijeka, Croatia. We are dedicated to designing and fabricating fine decorative concrete products for residential and commercial applications. From polished concrete countertops to custom indoor and outdoor items. Just as nature forms granite and marble, we sculpt concrete into stunning “one of a kind” pieces you can enjoy for a lifetime. Due to our proprietary high strength concrete mix designs you can rest assured your decor will last for generations to come.