POLISHED TIGER IRON
Tiger iron is an attractive rock composed of alternating bands of tiger's eye, red jasper, black hematite and yellow limonite. The undulating, contrasting bands of color and luster make for an attractive motif. It's formation due to ancient, oxygen producing cyanobacteria over two billion years ago, though there is some debate about whether Tiger Iron should technically be considered a stromatolite itself.
5 Items ($2 to $7)