mineral

Possible pink calcite or quartz-rich mineral specimen

Tentatively calcite (CaCO₃), possibly with iron-oxide staining; identification is uncertain from the image

AI-generated identification · may be incorrect

Translucent pale pink to orange-brown, with a glassy-to-pearly luster and irregular crystalline surfaces. Calcite has Mohs hardness 3, rhombohedral cleavage, and specific gravity about 2.71; quartz would be harder (7) and lack prominent cleavage.

Identified August 19, 2026More mineral →

Explore Possible pink calcite or quartz-rich mineral specimen 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: Possible pink calcite or quartz-rich mineral specimen
Scientific name: Tentatively calcite (CaCO₃), possibly with iron-oxide staining; identification is uncertain from the image
Category: mineral
Identified: August 19, 2026
Method: Standard

AI Estimated Value

About $2–$20 for a small common specimen; $25–$100+ if exceptionally crystalline, attractive, or locality-labeled.

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 from hydrothermal fluids or in a carbonate-rich cavity, with iron oxides producing the rusty coloration; age and locality cannot be determined visually.

Uses & applications

Calcite is used in cement, lime, aggregate, and as a mineral specimen; attractive pieces may be sold for display. Quartz varieties are also used in glass, electronics, and jewelry.

Geological facts

A drop of dilute hydrochloric acid or vinegar may visibly fizz on calcite, but not on quartz; avoid acids if the specimen is valuable.

Field identification & locations

Check for rhombohedral cleavage and fizzing to support calcite; a steel nail scratches calcite but not quartz. Common sources include Mexico, the United States, Brazil, and Morocco.