Small pieces of naturally terminated tourmaline crystals. Each is unpolished and unique, between 1/8" to 1/2" in size.
Ships from our store in Newmarket, Ontario.
Black tourmaline, also known as schorl, is a crystalline boron silicate mineral compounded with iron and sometimes other elements, such as aluminum, lithium, magnesium, potassium, or sodium. It wasn't until the 18th century that it was realized that German schorl and Sri Lankan tourmaline were the same mineral. Schorl derives its name from the German village where it was originally found in abundance. The name "tourmaline," however, is derived from the Sinhalese words "turmali" and "thoramalli" for two different types of tourmaline gems. Tourmaline is currently mined in Afghanistan, Brazil, Kenya, Madagascar, Malawi, Mozambique, Namibia, Nigeria, Pakistan, Sri Lanka, and Tanzania.
Tourmaline is a six-member ring cyclosilicate having a trigonal crystal system. It occurs as long columnar and prismatic crystals that are usually triangular in cross-section, often with curved striated faces. Tourmaline is distinguished by its three-sided prisms as no other common mineral has three sides.
All tourmaline, and especially schorl, is pyroelectric, piezoelectric, and ferroelectric. Schorl displays the ability to attract and repel hot ash.
Possible correspondences: Afghanistan, ash, Brazil, electricity, energy, fire, Germany, heat, irregularity, Kenya, Madagascar, Malawi, Mozambique, Namibia, Nigeria, Pakistan, Sri Lanka, Tanzania, and triangularity.