It includes impressive graphs, comparing the the price of fancy colored diamonds to the platinum market and the stock market, and includes eye-catching data points, such as the fact that the price of fancy pink diamonds have increased by 443% over the last 10 years.
Although that is two to three times the cost of a metal detector, it is less than the price of the fancy explosive-sniffing equipment that is the main rival technology being developed for detecting metal-free mines.