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By DAILY MAIL REPORTER

'World's largest emerald': The gem, pictured here with owner Regan Reaney, is valued ay $1.15m and is set to be auctioned on Saturday

The world's largest cut emerald is set to go up for auction - and is expected to fetch $1.15million.
The 57,500-carat stone, which is the size of a watermelon, is scheduled to be auctioned off tomorrow by Western Star Auctions in British Columbia.
The gem, named Teodora, was found in Brazil and cut in India, before being sold to rare gems dealer Reagan Reaney in Calgary - but there are doubts over whether it is in fact a true emerald

The 57,500-carat stone, named Teodora, was found in Brazil and cut in India, before being sold to the rare gems dealer Reagan Reaney in Calgary

A security guard keeps a watchful eye of the stone as residents take a look at it at Western Star Auction House in Kelowna, British Columbia

'I’m positive it contains emerald but I’m not sure how much of it is emerald,' Jeff Nechka, the gemologist who appraised the stone, told JCK Magazine.
Nechka said that he can not even confirm that the stone is in fact the 'world’s largest emerald'.
The stone has been dyed so Nechka says it is possible that at least part of it could be dyed white beryl.

A worker polishes the world's largest emerald at Western Star Auction House in preparation for the public auction

'It has been dyed to some extent but it’s impossible to tell the intensity of the stone prior. It’s impossible to know how much of it is emerald.' he told JCK.
Director of Gemological Institute of America's West Coast Identification Service, Shane McClure, said he had not examined the stone but that if there is any white beryl in the stone, GIA would likely term it 'beryl with zones of emerald.'
'We probably would not call it emerald no matter what,' he told JCK. 'They seem to think there is indication of natural green coloration but we wouldn't call it emerald in any case.'

Floran Lacerte lifts the world's largest emerald which weighs 11.5 kg and kisses it at the Auction House

A visitor holds the world's largest emerald as security guards stand nearby

Despite the doubt, Nechka said that he was confident the stone has been priced accordingly. 'If it was solid, untreated emerald, you would be looking at 10 or 20 times the value for sure,' he told JCK.
Regan Reaney, the Calgary gem wholesaler who is selling the stone, told JCK that anyone who questions the stone is welcome to examine it.

source: dailymail