metamorphic

Blue aventurine or dyed blue quartzite pendant

Quartz (SiO₂), likely aventurine quartz/quartzite; exact identification requires testing

AI-generated identification · may be incorrect

Dark blue, polished, mostly opaque with a vitreous to waxy luster; quartz hardness is about Mohs 7, with no cleavage and conchoidal fracture. The visible metal wirework and polish indicate a crafted jewelry piece rather than a raw specimen.

Identified September 19, 2026More metamorphic →

Explore Blue aventurine or dyed blue quartzite pendant 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 aventurine or dyed blue quartzite pendant
Scientific name: Quartz (SiO₂), likely aventurine quartz/quartzite; exact identification requires testing
Category: metamorphic
Identified: September 19, 2026
Method: Standard

AI Estimated Value

Approximately $10–$50 for a common handmade pendant; $50–$150 or more if the stone is verified natural blue aventurine and the metalwork is precious.

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

Quartz-rich material formed through hydrothermal growth or metamorphism of sandstone; the blue color may result from inclusions, irradiation, or dyeing. Geological age and locality cannot be determined from the image.

Uses & applications

Used as ornamental stone and costume jewelry; value is primarily determined by craftsmanship, stone quality, and whether the color is natural. The metal setting appears decorative rather than diagnostic of the stone.

Geological facts

Blue aventurine is commonly colored by mineral inclusions such as dumortierite or riebeckite, while strongly uniform blue material is often dyed quartzite or glass. A scratch, streak, refractive-index, or magnification test is needed for confirmation.

Field identification & locations

Common sources of blue quartz and quartzite include Brazil, India, and Madagascar. Check for dye concentration in cracks, quartz-like hardness, lack of cleavage, and natural inclusions; avoid scratching the finished jewelry.