What Colour Is Lava Rock

Lava rock is available in three colors; reddish-brown, black, and gray. The minerals present in the rock and the cooling process determine its color. The reddish-brown tint appears only if the iron in the lava begins to oxidize when it is cooling down.

Are there different colors of lava?

The color of lava depends on its temperature. It starts out bright orange (1000-1150 C). As it cools the color changes to bright red (800-1000 C), then do dark red (650-800 C), and to brownish red (500-650 C). Solid lava is black (but can still be very hot).

What is the difference between red and black lava rock?

Landscapers know this rock as lava rock. Pumice is a froth of felsic volcanic glass. … The basaltic lava starts out black, but oxidation of iron during eruption and emplacement of the scoria turns it red.