This sale is for the large, lustrous Black Tourmaline (Schorl) crystal specimen from Minas Gerais, Brazil pictured. This nice large crystal specimen is one of the finest of the batch with nice luster and shape.
Measurements: 4x3x2" - 2 Lbs. Locality: Minas Gerais, Brazil
This large black tourmaline crystal from Brazil is a stunning addition to any collection. Measuring 4x3x2 inches, this lustrous pegmatite mineral boasts a natural shape that is sure to impress. It is perfect for those interested in crystals, minerals, and collectibles, and is sure to be a conversation starter.
The country/region of manufacture is Brazil, where this crystal was formed under unique geological conditions. Its impressive size and striking appearance make it a must-have for collectors and enthusiasts alike. Whether you are looking to add to your collection or simply appreciate the beauty of natural minerals, this black tourmaline crystal is an excellent choice.
TOURMALINE PROPERTIES: Tourmaline is a crystal boron silicate mineral compounded with elements such as aluminium, iron, magnesium, sodium, lithium, or potassium. Tourmaline is classified as a semi-precious stone and the gemstone comes in a wide variety of colors. The most common species of tourmaline is schorl. It may account for 95% or more of all tourmaline in nature.
Color - Most commonly black, but can range from colorless, brown, violet, yellow, orange, blue, red, green, pink, or bi-colored, or even tri-colored. Crystal habit - Parallel and elongated. Acicular prisms, sometimes radiating. Massive. Scattered grains (in granite). Crystal system - Trigonal. Cleavage - Indistinct. Fracture - Uneven, small conchoidal, brittle. Hardness - 7–7.5. Luster - Vitreous, sometimes resinous. Streak - White. Specific gravity - 3.06 (+.20 -.06). Density - 2.82–3.32. Courtesy of Wikipedia