A complaint filed in the Southern District of Florida by the Securities Exchange Commission has accused three South Florida men of perpetrating a $30 million Ponzi scheme said to have claimed more than 300 investors as victims.

According to court documents unsealed on Monday, the federal agency is alleging Miami resident Angel Aman and co-defendants Jonathan Seigel and Harold Seigel unlawfully misled lenders regarding investments into their purported diamond vendors Natural Diamonds Investment Co. and Eagle Financial Diamond Group Inc. The SEC is alleging the trio similarly deceived investors into contributing funds into a cryptocurrency venture, Argyle Coin.