# Black Obsidian Polished Cube Tumblestone - Natural Stone

Natural polished tumbled cubes of Black Obsidian , glossy jet-black volcanic glass with a smooth, mirror-like finish , tumbled smooth from rough rock.

### About these stones

**Black Obsidian.** A naturally occurring volcanic glass, formed when lava cools rapidly without crystallising. Known for its deep jet-black colour and high-gloss, reflective polish.

### Details

-   **Form:** Polished tumbled cubes
-   **Size:** Choose 9 to 13 grams, or 17 to 20 grams, varies naturally
-   **Stones:** Black Obsidian
-   **Origin:** Naturally sourced rough rock, hand-polished

Each tumblestone is unique , natural variations in colour, shape, size and pattern are part of the character of working with real minerals.

### Care

Keep dry and avoid harsh chemicals. As a natural glass, handle with care to avoid chips on edges and corners. Store in a soft pouch or padded compartment to protect the polished surface. Wipe with a soft dry cloth if needed.

_Sold as a decorative item. We make no medical, therapeutic or other claims about the stones. [Read our full disclaimer](/pages/disclaimer)._

## Details

- **Price:** 1.95 GBP - 2.95 GBP
- **Vendor:** Crystals Healing UK
- **Tags:** Polished Tumblestone

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| 9-13g | 1.95 GBP | In stock |
| 17-20g | 2.95 GBP | In stock |

## Images

- Black Obsidian polished cubes, glossy jet-black natural volcanic glass with mirror finish
- Hand-polished Black Obsidian cube tumblestone, reflective deep black natural stone

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> Source: [Crystals Healing UK](https://crystalshealing.co.uk/products/black-obsidian-polished-cube-tumblestone-natural-stone)
> Updated: 2026-07-12