Where does “ruskokivi” come from?

ruskokivi (Finnish) comes from Finnish rusko, from Finnish ruskea, from Proto-Finnic ruskeda — brown, red.

Ancestry of “ruskokivi”, step by step

ruskokivi traces back through two separate lines of ancestry.

Step	Language	Word	Meaning
1	Finnish	rusko	The reddish glow at or near the horizon during...
2	Finnish	ruskea	brown; A brown color
3	Proto-Finnic	ruskeda	brown, red

Step	Language	Word	Meaning
1	Finnish	kivi	stone; a piece of stone which is larger than a...
2	Latin	-la	nominative feminine singular of -lus; nominative...