The Scottish First Minister hinted that a hard Brexit could see a vote on independence within five years, but insisted that she was offering a “compromise solution” to the Prime Minister.
Ms Sturgeon has indicated that soft Brexit could take the issue of a second referendum on Scottish independence off the table in the short term.
But she told BBC One's Andrew Marr Show that she was prepared to call a fresh vote if the terms of Brexit were not right.
She said “they will be making a big mistake if they think that I'm in any way bluffing” because leaving the European Union created a “fundamental question” for Scotland.
“If we're going to be ignored, if our voice has been completely cast aside, our interests cast aside, then that can happen on anything,” she said.
“And we have to ask ourselves in Scotland are we happy to have the direction of our country, the kind of country we want to be determined by a right-wing Conservative government perhaps for the next 20 years, or do we want to take control of our own future? And that's the case that in those circumstances I think it would be right for Scotland to have the opportunity to decide.”
What experts have said about Brexit
What experts have said about Brexit
1/11 Chancellor of the Exchequer Philip Hammond
The Chancellor claims London can still be a world financial hub despite Brexit “One of Britain’s great strengths is the ability to offer and aggregate all of the services the global financial services industry needs” “This has not changed as a result of the EU referendum and I will do everything I can to ensure the City of London retains its position as the world’s leading international financial centre.”
2/11 Yanis Varoufakis
Greece's former finance minister compared the UK relations with the EU bloc with a well-known song by the Eagles: “You can check out any time you like, as the Hotel California song says, but you can't really leave. The proof is Theresa May has not even dared to trigger Article 50. It's like Harrison Ford going into Indiana Jones' castle and the path behind him fragmenting. You can get in, but getting out is not at all clear”
3/11 Michael O’Leary
Ryanair boss says UK will be ‘screwed’ by EU in Brexit trade deals: “I have no faith in the politicians in London going on about how ‘the world will want to trade with us’. The world will want to screw you – that's what happens in trade talks,” he said. “They have no interest in giving the UK a deal on trade”
4/11 Tim Martin
JD Wetherspoon's chairman has said claims that the UK would see serious economic consequences from a Brexit vote were "lurid" and wrong: “We were told it would be Armageddon from the OECD, from the IMF, David Cameron, the chancellor and President Obama who were predicting locusts in the fields and tidal waves in the North Sea"
5/11 Mark Carney
Governor of Bank of England is 'serene' about Bank of England's Brexit stance: “I am absolutely serene about the … judgments made both by the MPC and the FPC”
6/11 Christine Lagarde
IMF chief urges quick Brexit to reduce economic uncertainty: “We want to see clarity sooner rather than later because we think that a lack of clarity feeds uncertainty, which itself undermines investment appetites and decision making”
7/11 Inga Beale
Lloyd’s chief executive says Brexit is a major issue: "Clearly the UK's referendum on its EU membership is a major issue for us to deal with and we are now focusing our attention on having in place the plans that will ensure Lloyd's continues trading across Europe”
8/11 Colm Kelleher
President of US bank Morgan Stanley says City of London ‘will suffer’ as result of the EU referendum: “I do believe, and I said prior to the referendum, that the City of London will suffer as result of Brexit. The issue is how much”
9/11 Richard Branson
Virgin founder believes we've lost a THIRD of our value because of Brexit and cancelled a deal worth 3,000 jobs: We're not any worse than anybody else, but I suspect we've lost a third of our value which is dreadful for people in the workplace.' He continued: "We were about to do a very big deal, we cancelled that deal, that would have involved 3,000 jobs, and that’s happening all over the country"
10/11 Barack Obama
US President believes Britain was wrong to vote to leave the EU: "It is absolutely true that I believed pre-Brexit vote and continue to believe post-Brexit vote that the world benefited enormously from the United Kingdom's participation in the EU. We are fully supportive of a process that is as little disruptive as possible so that people around the world can continue to benefit from economic growth"
11/11 Kristin Forbes
American economist and an external member of the Monetary Policy Committee of the Bank of England argues that the economy had been “less stormy than many expected” following the shock referendum result: “For now…the economy is experiencing some chop, but no tsunami. The adverse winds could quickly pick up – and merit a stronger policy response. But recently they have shifted to a more favourable direction”
Asked if she was looking at a referendum “much quicker” than in five or 10 years' time if there was a hard Brexit she said: “I would think, yes. But let me not get away from this point, I'm putting to Theresa May a compromise solution.”
But the First Minister was critical of Mrs May's approach to the issue and co-operation with leaders of the devolved administrations.
She said that instead of “prioritising” the “sensible solution” of keeping the UK in the single market, Mrs May was trying to “appease” Eurosceptics in her “deeply-divided” party.
Voicing concerns about the Prime Minister's approach to the process, she added: “If the UK's coming out of the European Union that has enormous implications for Scotland as it does for other parts of the UK. It has enormous implications for our economy, for jobs, for living standards, for trade, investment, for the kind of society we are and I want to play my part in making sure we get the right outcome from that.
“That's why the Scottish Government has published proposals that we hope are taken seriously, but thus far almost two-thirds of the way to the triggering of Article 50 we know no more about the UK's position than we did the day after the referendum and that is increasingly unacceptable.”