mineral

Tourmalinated Quartz

Silicon Dioxide (SiO2) with Schorl inclusions (NaFe2+3Al6(BO3)3Si6O18(OH)4)

Hardness: 7 (Mohs scale); Color: Clear or milky white with black needle-like inclusions; Lustre: Vitreous; Crystal Structure: Trigonal; Cleavage: None/Conchoidal fracture; Specific Gravity: 2.65.

Hardness: 7 (Mohs scale)
Color: Clear or milky white with black needle-like inclusions

Identified May 9, 2026More mineral →

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Physical properties

Hardness: 7 (Mohs scale); Color: Clear or milky white with black needle-like inclusions; Lustre: Vitreous; Crystal Structure: Trigonal; Cleavage: None/Conchoidal fracture; Specific Gravity: 2.65.

Formation & geological history

Formed through hydrothermal processes where Schorl (black tourmaline) crystals grow within a silica-rich solution that later crystallizes into quartz. Primarily found in pegmatites.

Uses & applications

Commonly used in jewelry (cabochons, beads), decorative carvings, and as a popular specimen for mineral collectors and metaphysical practitioners.

Geological facts

The black needles are frequently referred to as 'arrows of amor' or 'Venus hair' when the inclusions are rutile, though in this specimen, they are specifically Schorl tourmaline.

Field identification & locations

Identify in the field by looking for clear to white quartz containing distinct, dark, prismatic needle-like crystals of tourmaline. Common locations include Brazil, Namibia, and Madagascar.

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