Bring together the striking appearance of Black Tourmaline and the symmetry of sacred geometry with this Black Tourmaline Platonic Set 5pc. The set contains five carved geometric forms: a tetrahedron, cube, octahedron, dodecahedron and icosahedron.

Black Tourmaline’s deep charcoal-to-black colouring gives each shape a distinctive appearance, allowing the edges and faces to stand out. Natural surface markings and variations in polish reflect the character of the stone.

The five Platonic solids are mathematical forms with identical regular polygon faces and the same number of faces meeting at every vertex. Carved in Black Tourmaline, they offer a tactile way to explore geometry alongside the elemental symbolism used in sacred geometry and crystal practice.

The Five Shapes and Their Meanings

Tetrahedron — Fire
Four triangular faces create this pointed form. In sacred geometry, it symbolises motivation, courage and new beginnings. Use it as a focus when setting an intention or considering the first practical step towards a goal.

Cube — Earth
Six square faces form a stable, balanced structure. Associated with grounding, foundations and consistency, the cube complements Black Tourmaline’s traditional symbolism. It offers a reminder to establish steady routines and clear personal boundaries.

Octahedron — Air
Eight triangular faces create a form resembling two pyramids joined at their bases. Symbolically associated with thought, communication and perspective, it provides a focus for reflection and considering a situation from different viewpoints.

Dodecahedron — Ether or Spirit
Twelve pentagonal faces give this solid its intricate appearance. Linked symbolically with the cosmos and spiritual connection, it offers a focus for contemplating the wider picture while maintaining a sense of grounding.

Icosahedron — Water
Twenty triangular faces create the most rounded of the five forms. Associated with flow, adaptability and creativity, it serves as a reminder to remain flexible while staying connected to your intentions.

These elemental meanings are traditional symbolic associations used in sacred geometry.

Why Add This Set to Your Collection?

• Collect all five Platonic solids: Compare their faces, edges and symmetry in one coordinating stone.
• Explore sacred geometry: Discover the relationship between geometric forms and their traditional elemental meanings.
• Create a grounding meditation focus: Choose a shape to accompany quiet reflection, journalling or intention setting.
• Build a crystal grid: Incorporate the forms into arrangements centred on grounding, stability or personal boundaries.
• Enjoy a distinctive display: The dark stone highlights the geometry and contrasts beautifully with lighter crystals.

Mineral Composition

Black Tourmaline is commonly the iron-rich tourmaline species Schorl, a complex borosilicate mineral.

Typical Schorl Formula: NaFe²⁺₃Al₆(Si₆O₁₈)(BO₃)₃(OH)₄
Crystal System: Trigonal
Form: Carved geometric solids. These shapes are created by carving rather than natural crystal growth.

Metaphysical Properties

In crystal practice, Black Tourmaline is traditionally associated with grounding, protection and maintaining personal boundaries. It is often chosen as a symbolic reminder to remain centred and deliberate about where you direct your attention.

Combined with the five Platonic solids, it offers several points of focus for a personal practice. Choose the cube when reflecting on stability, the tetrahedron when beginning something new, or the icosahedron when considering how to approach change.

Chakra

Root.

Zodiac

Capricorn.

Element

Earth. Each shape also carries its own elemental symbolism, as described above.

Crystal Pairings

Smoky Quartz: For intentions centred on grounding and stability.
Rose Quartz: To combine the symbolism of personal boundaries with compassion.
Clear Quartz: To accompany intentions involving clarity and focus.

What Is Included?

One five-piece Black Tourmaline set containing:

• Tetrahedron
• Cube
• Octahedron
• Dodecahedron
• Icosahedron

We will intuitively choose a set for you. Natural markings, surface texture and finish will vary between pieces.

Hardness and Care

Hardness: Approximately 7–7.5 on the Mohs scale.

Although relatively hard, Black Tourmaline can be brittle. Protect the carved edges and points from knocks. Clean gently with a soft cloth, using a little water if needed, and dry thoroughly.

Shipping Information

We offer reliable and carefully managed delivery services to ensure your order arrives safely and securely.

Royal Mail Tracked 48 — £3.80
Available for smaller parcels weighing up to 2kg, with an estimated delivery time of 2–3 working days after dispatch.

DHL / DPD Courier Delivery — £6.87
Available for UK mainland deliveries weighing up to 20kg, providing a reliable service for larger or heavier orders.

All orders are carefully packaged to protect your specimens during transit.

Shipping options and applicable charges are confirmed at checkout.

Thank you for choosing GeoFossils.