> Obsidian is a black volcanic glass, of medium hardness (5 to 5.5 on the Mohs scale), which tradition links to protection and grounding. Beautiful but britt

*Source : https://meilleures-bijouteries.fr/en/guides/obsidian-benefits/*

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● Guide

# Obsidian: virtues, grounding and protection

Published on **25/07/2026** · By **Sébastien Joumel**

In brief

**Obsidian is a black volcanic glass, of medium hardness (5 to 5.5 on the Mohs scale), which tradition links to protection and grounding.** Beautiful but brittle, it needs some care. Here's what it really is, what tradition says, and how to wear it.

## What obsidian is

Obsidian isn't a crystalline mineral but a **natural glass**, formed by the very rapid cooling of lava. Hence its smooth, glassy look, often deep black (sometimes "snowflake", "celestial eye" or "golden"). Its hardness (**5 to 5.5**) is moderate and, above all, it is **brittle**: it breaks into sharp-edged shards.

## Meaning & virtues in tradition

In crystal tradition, obsidian is a stone of **protection** and **grounding**, said to help "cut" negative influences. **These virtues are traditions and beliefs: they are not scientifically demonstrated and replace no medical advice** (see sources).

## How to wear and choose it

Its fragility makes it better suited to a **pendant or a protected bracelet** than a heavily used ring. Avoid knocks. When buying, beware tinted glass sold as obsidian: genuine obsidian sometimes shows fine inclusions or sheen. See our [natural stone jewellery guide](https://meilleures-bijouteries.fr/en/guides/natural-stone-jewellery-guide/).

## Care

Lukewarm water and a soft cloth, no ultrasonics (chipping risk). Store it separately to avoid scratches and knocks.

## Sources & references

-   **French National Museum of Natural History** ([mnhn.fr](https://www.mnhn.fr)): mineralogy and volcanic rocks.
-   **Mohs scale**: hardness (obsidian ≈ 5-5.5).
-   **DGCCRF** ([economie.gouv.fr/dgccrf](https://www.economie.gouv.fr/dgccrf)): health claims.

## Frequently asked questions

What are the virtues of obsidian?

Tradition links it to protection and grounding, said to "cut" negative influences. These virtues are beliefs, with no scientifically demonstrated effect, and replace no medical advice.

Is obsidian fragile?

Yes, relatively: it's a volcanic glass of medium hardness (5 to 5.5) and brittle, breaking into sharp shards. Prefer it in a pendant or protected bracelet and avoid knocks.

Is obsidian a real stone?

It's a glassy volcanic rock rather than a crystalline mineral: a natural glass formed by the rapid cooling of lava. It is genuinely natural, but different from a crystal like quartz.

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