Gentile is an American studio set up by John Gentile. If I recall correctly he is of Italian extraction and learned his techniques in Murano. When I say Italian, I mean Murano.
I have some Gentile weights from the late 90's that have those colours.
Gentile weights usually had a mark impressed into the base that changed from time to time. there were also earlier pieces, I believe, that had rough ground bases.
The finishing on the base of your weight makes me lean toward Murano but I can't be certain.