Schorl
Black Tourmaline tumbled
A variety of Black Tourmaline
What is Schorl?
Schorl or schorl is one of several varieties of an important gem known as Tourmaline and it's probably the most common within this group. When raw, it's a black, opaque, needle-like crystal. A polished schorl was once used as a mourning jewel during the Victorian era, but it's rarely used in jewelry in modern times. The largest schorl crystal was found in Overlook (New York, USA). Its weight was 8 kg.
Healing Properties
The most protective of all crystals, schorl supports the base chakra. It is said to encourage balance and neutrality, release stress, and discharge tension. It also known to dispel anxious feelings and negative emotions, creating a relaxed environment. This stone can apparently be used in homes as a protection grid.
Optical Properties
- Refractive Index
- 1.635-1.672
- Birefringence
- 0.025
- Pleochroism
- Very strong: yellow-brown, pale yellow, pale brown
- Optical Character
- Uniaxial negative
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Schorl before comparing listings or appraisals.
Size & Weight
Larger, intact specimens usually command higher prices.
Rarity & Demand
Scarce material or popular varieties sell at a premium.
Condition & Finish
Chips, repairs, and heavy wear lower value; clean prep helps.
Treatment & Provenance
Untreated specimens with documented locality are prized.
Schorl Localities Map
See where Schorl is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- Black
- Streak
- Greyish-white to bluish-white.
Chemical Properties
- Chemical Formula
- Na(Fe3)Al6(Si6O18)(BO3)3(OH)3(OH)
- Elements
- Al, B, Fe, H, Na, O, Si
Also Known As
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Schorl FAQs
How do I identify Schorl?
Schorl can be identified by its Black color. Look for these key characteristics when examining specimens.
What color is Schorl?
Schorl typically appears in Black. Color can vary depending on impurities and formation conditions.