Pyrite Polished Cylinder Tower with Black Tourmaline Inclusion

This polished pyrite tower is a striking metallic specimen featuring natural black tourmaline inclusions set within a highly reflective iron sulphide matrix. The combination of brassy gold pyrite and contrasting dark mineral veins creates a bold, high-contrast appearance, enhanced by the mirror-like finish of the polished surfaces.

Unlike typical quartz-based towers, this piece stands out for its dense metallic composition and weight, giving it a solid, substantial feel. The visible inclusions indicate a multi-stage mineral formation process, where tourmaline crystallised alongside or prior to the pyrite, becoming naturally enclosed within the structure.

Key Features

Material: Pyrite (iron sulphide) with black tourmaline inclusions

Chemical Formula: FeS₂ (pyrite)

Secondary Mineral: Tourmaline group (likely schorl – sodium iron aluminium borosilicate)

Colour: Metallic gold with black inclusions

Lustre: Metallic (highly reflective)

Transparency: Opaque

Crystal System: Cubic (pyrite)

Finish: Polished tower with smooth, reflective faces

Notable Features: Strong contrast inclusions, natural fracture lines, mirror-like surfaces

Dimensions

Height: 5.3 cm

Width: 3.5 cm

Weight: 146 grams

Geological & Scientific Notes

Pyrite is an iron sulphide mineral that forms in a wide range of geological environments, most commonly within hydrothermal veins, sedimentary deposits, and metamorphic rocks. Its metallic lustre and pale brass-yellow colour are caused by its crystal structure, which reflects light efficiently across smooth surfaces.

The black inclusions visible within this piece are consistent with tourmaline, most likely the iron-rich variety known as schorl. Tourmaline forms under different chemical conditions than pyrite, meaning this specimen represents a multi-phase mineralisation process where two distinct minerals formed and became naturally intergrown.

The polished finish enhances the reflectivity of the pyrite while preserving internal structures, fractures, and inclusion zones—offering a clear view into the mineral’s formation history.

Care Information

Avoid prolonged exposure to moisture (pyrite can oxidise over time)

Store in a dry environment

Do not use harsh chemicals or acidic cleaners

Clean gently with a dry or slightly damp soft cloth

Avoid dropping, as natural fractures may be present

Why This Piece Stands Out

High-contrast combination of metallic pyrite and black tourmaline

Dense, weighty feel compared to quartz-based pieces

Naturally occurring inclusion pattern – no two pieces are the same

Strong reflective surfaces that change appearance with light and angle