Raw Biotite Gneiss Specimen
Set of 12 Samples, 1″

This foliated metamorphic rock usually forms at convergent plate boundaries, and recrystallizes with immense heat and pressure. Excellent for students learning about differential stresses and foliation in metamorphic rocks.
While each specimen will vary slightly in shape, size and color, it will measure approximately 1″ in length. Each is individually packaged, labeled & barcoded for easy identification and storage.

Selected & Processed by a Geologist.
Each and every specimen is selected and hand processed by an actual geologist, ensuring that each sample exhibits defining features. Rocks and minerals are sourced from a variety of locations around the world and are processed by hand in Victor, NY.
Technical Support
Always feel free to reach out to our team of scientists and geologists for additional information, or to assist you with any questions regarding our rock and mineral samples.