mineral

Blue glassy mineral fragment, possibly kyanite or blue quartz

Indeterminate from image; candidates include kyanite (Al₂SiO₅) or blue quartz (SiO₂)

AI-generated identification · may be incorrect

Transparent blue-gray, vitreous luster, sharp irregular fracture, and no visible crystal faces; hardness could range from ~5–7. It may also be colored or industrial glass, which can resemble minerals closely.

Identified August 24, 2026More mineral →

Explore Blue glassy mineral fragment, possibly kyanite or blue quartz in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

At a glance

Common name: Blue glassy mineral fragment, possibly kyanite or blue quartz
Scientific name: Indeterminate from image; candidates include kyanite (Al₂SiO₅) or blue quartz (SiO₂)
Category: mineral
Identified: August 24, 2026
Method: Standard

AI Estimated Value

$0–$10 if ordinary glass or an unidentified fragment; approximately $5–$50 for a small common kyanite or blue-quartz specimen.

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

If kyanite, it formed by regional metamorphism of aluminous sediments, commonly during mountain building; if quartz, it crystallized in hydrothermal veins or igneous/metamorphic rocks. Age depends on locality and cannot be determined visually.

Uses & applications

Kyanite is used in refractory ceramics and occasionally as a collector mineral; blue quartz is mainly ornamental. A glass fragment has little geological or collector value.

Geological facts

The thin, sharp, conchoidal-looking edges and uniform blue-gray appearance are more suggestive of glass than a natural crystal. A scratch, streak, hardness, and refractive-index test are needed for identification.

Field identification & locations

Check for bubbles, flow lines, perfectly conchoidal fracture, and consistent color to detect glass; natural kyanite commonly shows bladed crystals and strong directional hardness. Avoid handling sharp edges.