Finniss has been estimated to have a net present value of A$140 million and an internal rate of return of 142%, with payback of less than 12 months.
Core could have US$20 million coming its way to build the project as a pre-payment from "one of China's largest lithium producers", Yahua, subject to project approvals and feasibility work.
The currently defined short-life project is now subject of feasibility work, with financing and construction slated for next year.
Core believes there is significant potential to identify additional mine life, with three drill rigs currently active.
In April Core raised $5 million at 5.3c per share, while last month Yahua put in $1.4 million on the same pricing terms.
Shares in Core were up 2.3% to 4.4c in after...