In my country there is a highly controversial geologist who is obsessed with diamonds. He constantly produces work about diamonds, yet he is the only one who ever sees them. Other professional geologists say that the samples he claims to have never existed. My question is: how can I really debunk him? I’m attaching the images of the diamonds he publishes in his articles. Is there any way to find out whether they come from an earlier source or from other publications, in case they are fake? These are the images of diamonds that he adds to his publications.