Rhyolite is the hardest form of lava rock.  Our deposit is multi colored with shades of pink, grey, whites and tans.  Our rock is mainly used for landscape  It makes a great low maintenance hardscape. Our 3/4 & 3/8 materials are washed so there is very little fines or dust in the material.  All sizing is approximate.  Our material is not intended to meet any specifications.  Sold in bulk or wholesale we do not load pickups or small trailers. Material yards or landscape yards near you should have our material, Contact us for a location near you.