Jasper (red, rounded)

Jasper is a red variety of chert, a sedimentary rock composed of very finely-crystalline quartz with the red colouration coming from hematite (Fe2O3).

Sedimentary. Formed by moderate pressure and heat.

Size: Hand specimen.

Locality: Canterbury.

Demonstrates erosion to a smooth oval shape due to movement down rivers and the coastline.

Images are examples of specimens only. Sizes and shapes may vary.