What i meant was that production science needs 24 stone bricks. In angels you get a lot of stone by crushing saphire ore or stir ore to get iron or or copper ore. Now that the dropships give you this ore, you miss all these stone and in the angels setting there is no option to mine stone.
It was just a though. I added it myself as my base ran out of crushed stone since i had an overflow of ore from the dropships. If the dropships would give stone it would help as there is no other way to get it :D