A macrodiamond has been recovered from a drill program at the Abminga kimberlite field in South Australia.
Operator Caldera Resources (CDR-M) says the discovery was made in a small drill-Core sample that was processed for heavy minerals by caustic fusion at Lakefield Research.
The 3-kg sample was derived from a group of samples obtained from a drill program that tested three separate pipes.
The diamond is described as clear and colorless, its major axis measuring 0.75 mm long. Along with the diamond, another grain was observed, which is speculated to be carbonado, a dull grey-To-black porous form of diamond.
Additional drilling will investigate some of the pipes to a depth of at least 400 metres. The program will provide bulk samples of up to 40 kg, which the company says will be more suitable for diamond-Testing than previous samples, which were designed to be tested for indicator minerals.
The Abminga field covers about 250 magnetic targets, which remain to be tested for their diamond potential.
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