Talk:Composite Rock (skalt711)/@comment-30713663-20180418153353

https://en.wikipedia.org/wiki/HD_85512_b Bigger (sort of) rock.

These lists may also contain more possible upgrades: https://en.wikipedia.org/wiki/List_of_nearest_terrestrial_exoplanet_candidates

https://en.wikipedia.org/wiki/Super-Earth

Also, if we're using asteroid travel speed, what about comet travel speed &/or the speeds some planets orbit at?

We should also look into radioactive types of rocks. Quoting: http://webmineral.com/help/Radioactivity.shtml

"Of the three main types of radioactive decay, gamma radiation causes the most damage because it has a greater effect on biological materials and is neutralized only by heavy shielding. The next most damaging type of radiation is beta particles which is absorbed by a few feet of air. The least damaging is alpha particles which has a range of 6 inches or less in air."

We should maybe also look into conductivity. How much electricity rocks can handle, how it travels through them, as well as heat resistance.

Do gemstones qualify as rocks? Light refraction might be useful.