metamorphic

Garnet-bearing Schist / Conglomerate Specimen

Metamorphic rock with almandine garnet porphyroblasts

AI-generated identification · may be incorrect

Hardness varies from 6.5 to 7.5 for the garnet crystals and around 3-4 for the host matrix; color is brownish-gray with reddish-brown embedded crystals; luster is vitreous to resinous in the crystals; crystal structure is isometric for garnet; specific gravity ranges from 3.5 to 4.3.

Identified August 1, 2026More metamorphic →

Explore Garnet-bearing Schist / Conglomerate Specimen in the encyclopedia →

Identify your own rocks.

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

App Store Google Play

Physical properties

Formation & geological history

Formed through regional metamorphism of clay-rich sedimentary rocks under high temperature and pressure, typically occurring during continental collision events over millions of years.

Uses & applications

Used primarily as educational specimens, mineral collecting, lapidary cabochons, and occasionally abrasive industrial applications.

Geological facts

Garnets form as porphyroblasts, growing larger than the surrounding fine-grained matrix minerals as the rock undergoes intense pressure and temperature changes.

Field identification & locations

Identify by looking for distinct, reddish-brown, dodecahedral or rounded crystal grains embedded within a smoother, weathered rock matrix. Found globally in metamorphic terranes such as New England, USA, and various Scandinavian regions.