Ruby is a fairly common ore found below 50m. It's good to keep some ruby ores to upgrade your base, but otherwise it's not very important.
- In real life, Ruby is a pink to blood-red coloured gemstone and is considered one of the four precious stones together with Sapphire, Emerald, and Diamond.
- Ruby is generally valued among newbies due to its look and colour scheme, especially since red is a colour which often sends the mind into a short state of alert; prompting newbies to give it a second look.
- Ruby isn't it's own mineral. Ruby is actually a colour variation of corundum and appears red in real life along with Sapphire which appears blue.