How do I identify Bertrandite?

Bertrandite can be identified by its hardness of 6 - 7 on the Mohs scale, Colourless color. Look for these key characteristics when examining specimens.

What color is Bertrandite?

Bertrandite typically appears in Colourless, pale yellow. Color can vary depending on impurities and formation conditions.

How hard is Bertrandite?

Bertrandite has a hardness of 6 - 7 on the Mohs scale. This gives it moderate hardness.

How to Identify Bertrandite | Properties, Meaning & Uses

What is Bertrandite?

Bertrandite is a beryllium sorosilicate hydroxide mineral with composition: Be4Si2O7(OH)2. Bertrandite is a colorless to pale yellow orthorhombic mineral with a hardness of 6-7. It is commonly found in beryllium rich pegmatites and is in part an alteration of beryl. Bertrandite often occurs as a pseudomorphic replacement of beryl. Associated minerals include beryl, phenakite, herderite, tourmaline, muscovite, fluorite and quartz. It, with beryl, are ores of beryllium. It was discovered near Nantes, France in 1883 and named after French mineralogist, Emile Bertrand (1844–1909). One of the world's largest deposits of bertrandite is Spor Mountain, Thomas Range, Utah which is currently the source of most of the world's beryllium production.

Bertrandite Market Value Calculator

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

Bertrandite Localities Map

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