With this guide you can get free infinite pulsar quartz.
Guide to Get Infinite Pulsar Quartz
Go to the secret ladder that is not in the water on the big crater at the southwest of the map and navigate to the lowest level until you find a pulsar quartz on a table.
Keep taking the pulsar quartz, saving, and reloading until you get a ton.
Note: Make sure that you do not have too much running on your computer or your will fall through and respawn with all of your items at the last living compartment you were in.