Kimberlite is an economically important rock type, so finding kimberlite leads to finding diamonds. Kimberlite is an igneous rock and is also the parent rock of diamond, so the search for diamond mines usually begins by looking for kimberlite. There are intermittent diamond deposits inside the kimberlite, and diamond is one of several minerals that exist. However, not all kimberlites contain diamonds, other stones often found with diamonds are mica, garnet and zircon. Diamond is the hardest substance known to human beings, and is often used as abrasives, cutters, etc. in industry. Diamonds with diamonds as primary stones have always been regarded by mankind as a symbol of power, majesty, status and wealth.