In her first major championships in four long years, having overcome a badly broken wrist and serious hamstring and Achilles injuries, this was a win for the ages.
On her joyous finish-line exclamations, she said: "I don't know if it was surprise but the emotion just escaped my body because I was so excited and so happy to have achieved what I've worked so hard for".
"From the first day I started training (in August 2016) I knew it was possible, I knew I could get here", she said.
Pearson split acrimoniously from her longtime coach Sharon Hannan after finishing second behind Brianna Rollins at the 2013 world titles.
'My husband is in the crowd there somewhere, I'll try and find him and give him a hug soon.
World record holder Kendra Harrison disappointed in finishing only fourth confirming that her Achilles heel is a lack of championship experience having failed to make the Olympic team past year.
With Olympic gold and silver medals and now two world championship golds and a worlds silver to her name, Pearson stands as the most decorated track athlete and arguably the best overall athlete Australia has produced in the modern era.
"I'm still young, this was my first world final, people forget that because I'm the world record holder", said the 24-year-old.
'I never doubted (the self-coaching) - she knows her body, she has been doing it more than long enough.
'I have just been lucky enough to see the whole journey and all the struggles she has gone through behind the scenes.
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Nolasco threw a complete-game shutout against the Mariners earlier this year but fell victim to the long ball on Friday . Reliever Casey Lawrence allowed two runs in the seventh inning, and Tony Zych allowed three more in the eighth inning.
She assumed favouritism for the 2017 world title by clocking the fastest semi-final time of 12.53 on Friday evening and carried that dominance into the final.
"She has got the determination that whatever she sets her mind to she is going to do it and she is going to do it properly".
Farah, who won the 10,000m once again last weekend, dug in to finish 0.43secs behind new world champion Edris, while Paul Chelimo of the United States claimed bronze.
"I love this stadium".
Nelson, Pearson's long-time rival, was excited to be back and win the silver again in London.
World record holder Kendra Harrison from the USA finished out of the medals in fourth place.
In contrast to the experience of Pearson and Harper-Nelson, this is just Dutkiewicz's second senior medal, though the German will be confident heading into the European Championships in her home nation next year.
"They had more belief than me coming into tonight". Since former champion Dawn Harper Nelson (season best 12.63) won the heat, the Americans have four in the final and could sweep the medals again - like they did a year ago at the Rio de Janeiro Olympics.
The 30-year-old's sublime run contrasted sharply with America's world record holder Kendra Harrison who squeaked into the final as the slowest of the two fastest losers who qualify.