mineral

Tourmalinated quartz point

Quartz (SiO₂) with black tourmaline (schorl, NaFe²⁺₃Al₆(BO₃)₃Si₆O₁₈(OH)₄) inclusions

AI-generated identification · may be incorrect

Hardness: quartz 7, tourmaline 7–7.5 Mohs; white to translucent quartz with black needle-like or irregular inclusions, vitreous luster, trigonal quartz structure, and no prominent cleavage. The pointed, polished shape is human-made.

Hardness: quartz 7, tourmaline 7–7

Identified August 23, 2026More mineral →

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At a glance

Common name: Tourmalinated quartz point
Scientific name: Quartz (SiO₂) with black tourmaline (schorl, NaFe²⁺₃Al₆(BO₃)₃Si₆O₁₈(OH)₄) inclusions
Category: mineral
Identified: August 23, 2026
Method: Standard

AI Estimated Value

Approximately $10–$40 for a common polished point; $50–$150 or more for large, clear quartz with attractive, sharply defined tourmaline inclusions.

Not an official valuation

AI estimate for general interest only — not an appraisal. Actual value depends on condition, provenance, and market demand. Verify with a professional before buying, selling, or insuring.

This identification was generated by AI and may contain errors. Verify important details before relying on them — and never use an AI result to judge whether a specimen is safe to handle. Read the full disclaimer

Physical properties

Formation & geological history

Forms when quartz crystallizes in hydrothermal veins or pegmatites around earlier or simultaneously growing schorl tourmaline. Such specimens commonly formed in granitic pegmatites, generally during the Mesozoic to Cenozoic, depending on locality.

Uses & applications

Used as a decorative crystal, meditation object, lapidary specimen, and collector’s piece; it has little industrial value in this polished form.

Geological facts

The black material is typically schorl, the most common black tourmaline. Tourmalinated quartz is valued for the contrast between transparent or milky quartz and dark inclusions.

Field identification & locations

Identify by testing quartz hardness, observing black tourmaline inclusions, and checking that the inclusions are internal rather than surface paint. Common sources include Brazil, Madagascar, Pakistan, and the United States.