mineral

Quartz-rich weathered rock, possibly quartz geode or vuggy quartz vein

Quartz (SiO₂), likely with iron-oxide staining and possible feldspar/calcite matrix

AI-generated identification · may be incorrect

Pale cream to gray, white crystalline surfaces with earthy brown staining; likely vitreous to dull luster and irregular fracture. Quartz has Mohs hardness 7, no cleavage, hexagonal crystal structure, and specific gravity about 2.65; exact properties are uncertain without testing.

Identified August 15, 2026More mineral →

Explore Quartz-rich weathered rock, possibly quartz geode or vuggy quartz vein 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: Quartz-rich weathered rock, possibly quartz geode or vuggy quartz vein
Scientific name: Quartz (SiO₂), likely with iron-oxide staining and possible feldspar/calcite matrix
Category: mineral
Identified: August 15, 2026
Method: Standard

AI Estimated Value

Approximately $5–$25 as a common rough specimen; larger, cleaner crystals or confirmed geode material may sell for $30–$100+.

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 when silica-rich hydrothermal fluids deposited quartz in a cavity or fracture, later weathered near the surface; the specimen’s geological age cannot be determined from the image. Brown coloration commonly comes from limonite or other iron oxides.

Uses & applications

Quartz is used in glass, electronics, abrasives, and engineered stone; attractive crystals are collected or used decoratively. This rough specimen has modest commercial value.

Geological facts

The granular, cavity-filled texture resembles a quartz vein or small geode, but the image does not show diagnostic crystal faces clearly enough for a precise identification.

Field identification & locations

Test with a steel file or knife: quartz should resist scratching; it will scratch ordinary glass. Common sources include hydrothermal veins and weathered granitic or metamorphic terrains worldwide; acid testing can help distinguish calcite matrix.