Prudent Man Agate Slab yellow green cabochon They are three-billion-year-old mats of

They are three-billion-year-old mats of cyanobacteria (blue-green algae)

Weight: 270 grams

9mm x 21mm at widest points

Kingman turquoise

925 for the sterling silver content of this mixed-metal pair

Prudent Man Agate Slab yellow green cabochon They are three-billion-year-old mats ofPrudent Man Agate comes from an area near Mackay, Idaho. The name is a tongue in cheek reference to an old mining law called the Prudent Man clause, which states that claims are only valid if "a prudent man could make a living working on it," the claim owner thus jokingly asserts that the government has declared him an unprudent man. This slab comes from Vein #2, the second purveyance of this material, and displays a rather wild assortment of banded