Labuschagne created history overnight on Wednesday when he became the first Glamorgan player to hit centuries in both innings of a county match in 14 years.
The 25-year-old backed up his first-innings 106 against Worcestershire with an even 100 in the second innings in Cardiff, to make the first twin centuries of his first-class career.
Labuschagne, a last-minute signing as cover for Shaun Marsh, has now posted five tons from nine matches in the second division of England’s domestic competition.
He became the first player past 1000 first-class runs this season during the match, so becoming the first Glamorgan batsman to achieve that particular feat since Steve James in 1997.
His achievements this season were duly rewarded when he was presented with his county cap by Glamorgan stalwart Alan Jones during the lunch interval.
Prior to the game, he had also scored four other half centuries,
His remarkable conversion rate has already seen score more runs than the leading Div 2 run-scorer last season, and in six fewer matches,furthering his case for consideration in Australia's squad for the Ashes.
With one more Championship game to play before Shaun Marsh returns, unless he is needed for the Test squad, Labuschagne has been a revelation. He has helped Glamorgan rise to the top of Division Two after finishing bottom last season, 36 points adrift from ninth place with only 13 batting points.
While Labuschagne was batting on, Burns was readying for his departure after a quick summons to England to join Australia 'A' for their bracket of four-day games ahead of the Ashes squad being finalised.
Burns cut short a playing stint with Lancashire in May to return home to Australia to recover from what tests identified was a protracted post-infectious fatigue disorder.He underwent a treatment period of rest and recuperation and has been training with the Queensland Bulls for the past two weeks.