KnowBlack Onyx
Chalcedony · Mohs 7
Solid black and traditionally a boundary stone, for holding a line without argument.
- Chakra
- Root
- Element
- Earth
- Zodiac
- Capricorn
- Care
- 💧 Water safe
Crystal database · Colour
Black Crystals
Every black stone in the database, with what it is made of and what it is traditionally used for.
Black stones are the protection group, kept by doorways, desks and beds to catch whatever comes in. They are the most practical stones on the shelf and the least romantic, and they are usually the first thing recommended to somebody who says their home feels heavy. Most of them are iron-bearing, dense and hard enough to handle daily wear without much care.
8stones listed
2safe in water
1keep out of water
6with a full guide
Black Tourmaline
Tourmaline · Mohs 7–7.5
The standard protection stone. Kept by doorways, desks and beds to catch what comes in.
- Chakra
- Root
- Element
- Earth
- Zodiac
- Taurus
- Care
- 💧 Brief water only
Blue Obsidian
Volcanic glass
Translucent blue glass used for speaking plainly when the stakes are high.
Worth knowing: Natural blue obsidian is extremely rare. Almost all bright blue obsidian on the market is manufactured glass.
- Element
- Water
Dalmatian Jasper
Feldspar rock
Cream with black spots, the stone people buy for children and for their own sense of humour.
Worth knowing: Dalmatian jasper is not a jasper. It is a feldspar-rich igneous rock, and the black spots are usually arfvedsonite rather than tourmaline.
- Element
- Earth
Hematite
Iron oxide · Mohs 5–6
Metallic grey and heavy in the hand, the most literal grounding stone on the shelf.
- Chakra
- Root
- Element
- Earth
- Care
- 💧 Keep dry
Obsidian
Volcanic glass · Mohs 5–5.5
Black volcanic glass, used both as a shield and as a mirror you may not enjoy looking into.
- Chakra
- Root
- Element
- Earth
- Zodiac
- Scorpio
- Care
- 💧 Water safe
Rhodonite
Silicate · Mohs 5.5–6.5
Pink shot through with black manganese, tied to forgiveness of the slow, practical sort.
- Chakra
- Heart
- Element
- Earth
- Care
- 💧 Brief water only
No guide on site yet What it pairs with
Shungite
Carbon · Mohs 3.5–4
Black carbon rock from Karelia, traditionally the purifier and filter stone.
- Chakra
- Root
- Element
- Earth
- Care
- 💧 Brief water only
No guide on site yet What it pairs with
Why the colour matters
Colour is the fastest way into the correspondence system, because the chakra scheme is itself colour-coded, and most traditional associations follow the colour rather than the mineralogy. It is also the least reliable guide to how a stone must be treated: two stones of the same colour can be a hard silicate and a soft copper carbonate, and only one of them survives a rinse. Each card above carries its own verdict, and the safety checker has the full reasoning.
Other colour groups
Fact and tradition, kept apart
The mineral family, the Mohs hardness and the water verdict on each card are checkable physical fact, drawn from standard mineralogical and gemmological references. The chakra, element and purpose associations are tradition, published across the modern crystal-healing literature and offered here for reflection rather than as fact. Nothing on this page is medical advice. Browse the full database →