Home > Schorl

Schorl

Black Tourmaline tumbled

A species of Black Tourmaline, Also known as Cockle, Shirl, Black Tourmaline

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.

General Info About Schorl

Instantly Identify Rocks with a Snap

Snap a photo for instant rock/gemstone/mineral ID and properties analysis, gaining quick insights on characteristics, market value, collecting tips, care, real vs fake, and health risks, etc.

Download the App for Free

Physical Properties of Schorl

Colors

Black

Streak

Greyish-white to bluish-white.

AI rock expert in your pocket

Chemical Properties of Schorl

Formula

Na(Fe₃)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)

Elements listed

Al, B, Fe, H, Na, O, Si

Optical Properties of Schorl

Refractive Index

1.635-1.672

Birefringence

0.025

Pleochroism

Very strong: yellow-brown, pale yellow, pale brown

Optical Character

Uniaxial negative

Characteristics of Schorl

Your Comprehensive Rock Characteristics Guide

In-depth exploration of rock types, features, and formation aspects

Download the App for Free

Cultural Significance of Schorl

Your Ultimate Guide to Understanding Rock Culture

Unveiling the mysteries of rock culture - exploring uses, history, and healing properties, etc

Download the App for Free

Healing Properties of Schorl

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.