How do I identify Sauconite?

Sauconite can be identified by its hardness of 1 - 2 on the Mohs scale, Reddish brown color. Look for these key characteristics when examining specimens.

What color is Sauconite?

Sauconite typically appears in Reddish brown. Color can vary depending on impurities and formation conditions.

How hard is Sauconite?

Sauconite has a hardness of 1 - 2 on the Mohs scale. This makes it a soft mineral that can be scratched easily.

How to Identify Sauconite | Properties, Meaning & Uses

What is Sauconite?

Sauconite is a complex phyllosilicate mineral of the smectite clay group, formula Na0.3Zn3(SiAl)4O10(OH)2·4H2O. It forms soft earthy bluish white to red-brown monoclinic crystals typically massive to micaceous in habit. It has a Mohs hardness of 1 to 2 and a specific gravity of 2.45. Optically it is biaxial positive with refractive index values of nα = 1.550 - 1.580, nβ = 1.590 - 1.620 and nγ = 1.590 - 1.620. It is found in vugs and seams in the oxidized zones of zinc and copper deposits. It occurs in association with hemimorphite, smithsonite, chrysocolla, coronadite and various iron oxides. It was named for the Saucon Valley in Pennsylvania, where it was originally discovered in 1875.

Sauconite Market Value Calculator

Estimate the market value of Sauconite using size, quality, and finish. This preview calculator is for quick context and is not a formal appraisal.

Sauconite Localities Map

See where Sauconite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.