Polished Desert Sunset slab DS175 dendrites Dimensions at widest points are

Dimensions at widest points are approximately 140 mm x 45 mm x 40 mm

Dimensions at widest points approximately 170 mm x 80 mm x 50 mm thick

Highly polished on both sides

Porphyry is a general term that is used rather loosely for  igneous rocks which contain relatively large isolated crystals set in a fine-grained groundmass

From near Paraburdoo

Polished Desert Sunset slab DS175 dendrites Dimensions at widest points areDS174 Desert Sunset slab, polished on one side . Dimensions at widest points approximately 135 mm x 120 mm x 10 mm thick. Weighs 303 grams. Desert Sunset is a banded iron formation that is comprised of alternating layers of red and yellow jasper and chert with narrow bands of black hematite. It comes from near Fields Find, a small abandoned gold mining centre in the Midwest region of Western Australia.