Argyle Diamond Investments Pty Ltd Home ›› Local Listings ›› NSW ›› Newcastle ›› Argyle Diamond Investments Pty Ltd NSW Miscellaneous Newcastle, NSW 2300 Craig Leonard0249270000https://www.argylepinkdiamondinvestments.com.au Pink Diamond prices have increased by an average of 367% in the past 11 years, making them one of the fastest growing hard assets in the world today. With the Argyle Mine closing in 2020 makes an Argyle Pink Diamond the ultimate "limited edition" tangible asset. Argyle Diamond Investments Pty Ltd based in Newcastle trades as a tangible asset wholesale business to the public and jewellery industry.