Why the Goldmine jewellery grading industry is worth $20 billion

The Goldmine grading industry was created in 2002 to help companies grade diamonds.It's now one of the biggest business in the industry with a turnover of $20bn a year.GoldMine is a diamond grading company in Melbourne, Australia that makes diamonds from raw diamond.It also sells diamond jewelry and diamonds.The company's CEO, Scott Satterfield, says it's a very valuable business."It's a...