'''Argyle Diamond Investments''' is owned and operated by Leonards family, who have been trading for over 80 years. Argyle Diamond Investments is an independent [[diamond]] investment firm offer clients an end-to-end solution from buying diamonds & storing to managing investment collections & re-selling. Argyle Diamond Investments Pty Ltd is located in central Newcastle being Australia’s seventh largest city with the world’s largest coal exporting harbour and Australia’s premier university. <ref>[https://www.argylediamondinvestments.com.au/about-us/ About Argyle Diamond Investments]</ref> | '''Argyle Diamond Investments''' is owned and operated by Leonards family, who have been trading for over 80 years. Argyle Diamond Investments is an independent [[diamond]] investment firm offer clients an end-to-end solution from buying diamonds & storing to managing investment collections & re-selling. Argyle Diamond Investments Pty Ltd is located in central Newcastle being Australia’s seventh largest city with the world’s largest coal exporting harbour and Australia’s premier university. <ref>[https://www.argylediamondinvestments.com.au/about-us/ About Argyle Diamond Investments]</ref> |