Early this year, former council chief executive Sue Bidrose said a property valuation for the site was expected "shortly", and negotiations to acquire the land formed by the 23-million-year-old volcanic crater lake near Middlemarch would begin once the council received the valuation.
Yesterday, the council would not say if it had the property valuation.
"Sorry, we can’t comment further at the moment," a council spokesman said.
The spokesman said the council was "continuing to work with the receivers and have nothing further to add at this point".
The 1000m diameter fossil-rich crater lake is considered to contain a globally-significant fossil and climate change record.
When it emerged Plaman Resources planned to mine 500,000 tonnes of diatomite a year at the site, it triggered outrage from neighbours and members of the scientific community.
Plaman Resources was moving to buy a neighbouring farm, to expand its mining footprint, when it was placed in receivership last year.
At the time, there were calls at a public meeting for the council to use the Public Works Act to acquire the site and prevent it being bought by another group with mining interests.
