Vivianite Crystal Blade

Elongated Brazilian Vivianite with dark blue-green blades, reflective ridges and contrasting brown associated material.

From the São Gabriel da Cachoeira area of Amazonas, Brazil, this Vivianite combines elongated bladed growth with dark blue-green colour and strongly defined lengthwise surfaces.

Closely arranged blades create a layered structure, with reflective ridges picking out the direction of growth. Viewed from different angles, the surfaces reveal changing highlights, subtle green-blue tones and the depth of the crystal arrangement.

The long, slender outline provides the principal display feature. Brown to ochre rounded mineral growth contrasts with the dark blades along part of the specimen. The associated material has not been separately identified; its texture adds further interest to the reverse and side views.

Vivianite is a hydrated iron phosphate mineral. Oxidation produces its familiar blue and green tones, which can deepen considerably. The relationship between crystal structure, surface reflection and deep colour rewards close examination.