Is green chert valuable?

Thanks for the A2A. Green chert is not common but it is by no means rare. Chert is common. Iron contamination of the chert can result in a red or green coloration. These iron stained cherts are also known as Jasper. Red Jasper is the most common. read more

Chert comes in a wide variety of colors, including differing shades of green. It is rarely valuable compared to semi-precious minerals, but special samples can be worth a few dollars. read more

Radiolarite is a variety of chert formed as primary deposits and containing radiolarian microfossils. Chalcedony is a microfibrous quartz. Agate is distinctly banded chalcedony with successive layers differing in color or value. Onyx is a banded agate with layers in parallel lines, often black and white. Opal is a hydrated silicon dioxide. read more

Chert is a hard and compact sedimentary rock, consisting dominantly of very small quartz crystals. It is a common rock type which occurs mostly in carbonate rocks either in nodular form or in layers (bedded chert). read more