The Antwerp World Diamond Centre (AWDC) has completed a marketing campaign that features a gumball machine filled with lab-created diamonds that can be won for €5 ($AUD8.90).

The deadline is approaching to enter the 2025 Australian Opal Awards, an event which recognises excellence in jewellery manufacturing and carving.

A platinum and diamond pocket watch owned by legendary criminal mastermind Al Capone has impressed collectors at auction in New York.