The halt will remain in place until the beginning of normal ASX trade on Monday, December 2, 2019, or when an announcement is made to the market, whichever occurs earliest.
Shares in Blackstone, which has a market cap of approximately $23 million, last traded at 12 cents.
Firm commitments for placement
In September the company received firm commitments from sophisticated, professional and institutional investors to raise up to $4.5 million through the placement of shares at 15 cents per share.
Additionally, eligible shareholders also had the opportunity to participate in a share purchase plan (SPP) to raise $500,000 at the same issue price per share.
The SPP provided the opportunity for eligible shareholders to subscribe for up to $30,000 worth of new shares in Blackstone.
The net funds raised under the placement and the SPP were spent towards exploration at the Ta Khoa project and other working capital.