mineral

Blue-gray quartz-bearing rock, likely rough chalcedony or silicified host rock

Microcrystalline quartz (SiO₂), possibly with iron-oxide staining and minor feldspar/clay minerals

AI-generated identification · may be incorrect

Pale blue-gray, white, and tan material with a waxy to dull luster and irregular fracture; apparent hardness about 6.5–7 Mohs if quartz-rich, with no obvious cleavage. The granular, weathered appearance prevents confident identification as a specific gemstone.

Identified August 23, 2026More mineral →

Explore Blue-gray quartz-bearing rock, likely rough chalcedony or silicified host rock 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-gray quartz-bearing rock, likely rough chalcedony or silicified host rock
Scientific name: Microcrystalline quartz (SiO₂), possibly with iron-oxide staining and minor feldspar/clay minerals
Category: mineral
Identified: August 23, 2026
Method: Standard

AI Estimated Value

About $1–$10 as an ordinary rough fragment; roughly $10–$40 if confirmed attractive, translucent lapidary-grade material.

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

Likely formed by silica-rich fluids filling fractures or replacing volcanic/sedimentary rock; iron staining developed during weathering. Exact geological age and locality cannot be determined from the photograph.

Uses & applications

Quartz-rich material may be cut or polished as an ornamental stone, cabochon, or lapidary rough, but this specimen appears mainly suitable for collecting unless it shows better color or translucency when cut.

Geological facts

The blue coloration may result from microscopic inclusions, alteration minerals, or lighting rather than true blue quartz. A streak, hardness, translucency, and locality would greatly improve identification.

Field identification & locations

Test whether it scratches glass and avoids a steel blade; inspect a fresh edge for glassy conchoidal fracture and translucent zones. Common analogues occur in hydrothermal veins and silicified volcanic rocks worldwide.