Tourmaline · Mohs 7–7.5
Black Tourmaline (Schorl): Identification, Meaning & Care
Schorl is the most common tourmaline species and often forms deeply striated prismatic crystals.
Black Tourmaline (Schorl) properties
- Formula
- Complex borosilicate
- Mineral group
- Tourmaline
- Mohs hardness
- 7–7.5
- Color
- Black to brownish black
- Transparency
- Opaque
- Luster
- Vitreous to resinous
- Cleavage / fracture
- Poor; uneven fracture
How to identify Black Tourmaline (Schorl)
- Strong lengthwise striations are a useful visual clue.
- Prisms may have rounded triangular cross-sections.
- Fresh broken surfaces are not glassy and curved like obsidian.
Black Tourmaline (Schorl) care
Water
Use a damp cloth rather than long soaking; dry deep striations thoroughly.
Light & heat
Generally stable in normal display conditions.
Storage
Store separately from harder materials and cushion sharp edges, points, or cleavage-prone faces.
Traditional meaning
Often used symbolically for grounding or protection in contemporary practice.
Traditional symbolism is presented as cultural history or personal practice, not as a scientific or medical claim.
Sources & further checking
- Mindat mineral database
- GIA Gem Encyclopedia
- RRUFF mineral database
- International Mineralogical Association
See our full methodology.