How do I identify Mirabilite?

Mirabilite can be identified by its hardness of 1.5 - 2 on the Mohs scale, Colourless color. Look for these key characteristics when examining specimens.

What color is Mirabilite?

Mirabilite typically appears in Colourless, white; colourless in transmitted light. Color can vary depending on impurities and formation conditions.

How hard is Mirabilite?

Mirabilite has a hardness of 1.5 - 2 on the Mohs scale. This makes it a soft mineral that can be scratched easily.

How to Identify Mirabilite | Properties, Meaning & Uses

What is Mirabilite?

Mirabilite, also known as Glauber's salt, is a hydrous sodium sulfate mineral with the chemical formula Na2SO4·10H2O. It is a vitreous, colorless to white monoclinic mineral that forms as an evaporite from sodium sulfate-bearing brines. It is found around saline springs and along saline playa lakes. Associated minerals include gypsum, halite, thenardite, trona, glauberite, and epsomite. Mirabilite is unstable and quickly dehydrates in dry air, the prismatic crystals turning into a white powder, thenardite (Na2SO4). In turn, thenardite can also absorb water and converts to mirabilite. Mirabilite is used as a purgative in the Traditional Chinese medicine; in Mandarin, it is called máng xiāo. The name 'mirabilite' is based on the phrase "Sal mirabilis" (Latin for "wonderful salt") used by Johann Rudolph Glauber when he inadvertently synthesized mirabilite.

Mirabilite Market Value Calculator

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

Mirabilite Localities Map

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