Black Onyx Sphere 150mm — Large Grounding Crystal

This Black Onyx sphere is an extra-large polished crystal with a deep black colour and a smooth, powerful presence. At 150mm and roughly 4.5kg, this piece is genuinely rare in size and makes a strong statement in any crystal collection or home display.

So what is black onyx known as? It is a stone of protection, grounding, strength, and emotional stability, often chosen by people who want to create a calmer space, reduce heavy energy, and feel more centred during stressful seasons. This sphere has a bold visual look, but its energy feels steady and composed, a strong choice for meditation rooms, offices, entryways, or altars.

About this specimen

Onyx is a variety of chalcedony, a microcrystalline form of quartz known for its smooth texture and layered formation, and black onyx in particular has been valued for its bold appearance and durability for centuries, historically worn by soldiers and used in protective rituals across many cultures. This piece is natural, smoothly polished, and selected specifically for its rich, even colour.

• Stone: natural Black Onyx, untreated
• Form: polished sphere
• Size: 150mm (5.9 in), approximately 4.5kg (10 lb)
• Chakra: root, solar plexus, third eye

Displaying your Sphere

Because of its size and weight, this sphere should sit on a stable surface or a properly sized stand. Dust with a soft, dry cloth, and avoid harsh chemicals, which are unnecessary for a stone this durable, and consider a stand designed for spheres this large to keep it secure.

Please note: crystals are not a substitute for professional medical advice, diagnosis, or treatment. Keep small pieces away from young children.