I don't have a date for the start of commercial acid polishing for stemware in the States - but do know that it began to be used in the U.K. for use routinely, on cut glass c. 1922/23 - and could be wrong, but I suspect this goblet to have been made prior to that date. Having looked again and blowing up the pix, must admit that the cutting on the goblet doesn't look particularly sharp.
To my eyes this style of pattern/cutting wouldn't necessarily make me think of either rock crystal or ABP - doesn't appear sufficiently fussy or sinuous enough - but I don't collect States glass, so could be talking tosh

As a guess, I'd have thought that rock crystal, by definition, would mean clear glass, rather than coloured. It may well be the colour that is ramping up the shekels.
Comparing the colour of the 'croesus' decanter (quoted by Jane Spillman as dating to c. 1890's) with this piece, there is a similarity, but the decanter appears brighter and less dense in colour - even the solid neck ring is not as dark a shade as the goblet. I'd be inclined to suggest the goblet is more blue (teal as Sue says), and the decanter looks more emerald. Looking at the cutting on the 'croesus' piece, it does have the look of ABP.
Ref. 'The American Cut Glass Industry - T. G. Hawkes and his Competitors' - Jane Shadel Spillman - 1996 - page 23.