Go to Himuro the 6th planet. Get to the end of the planet and go through the right rectangle. If you are in a hurry, then just get the minerals in the middle of the circle, if not, explore the full place. After that, go through the left rectangle and repeat. I have over 1 million G doing this. On this planet, Pearls (puts all minergy up by 12 and is worth 10,000 G)are common, Sapphires (puts all minergy up by 24 and is worth 15,000G) is moderate, Emeralds (puts all minergy up by 30 something and is worth 20,000G)are rare and Gold (puts all minergy down by 16 and is worth 100,000)is ultra rare.