Biotite Gneiss Specimen, Biotite Gneiss is high-grade metamorphic rock formed from other rocks undergoing alteration from intense heat and pressure., Each

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Here is the corrected text: Raw Biotite Gneiss Specimen - Single Sample, 1" This foliated metamorphic rock typically forms at convergent plate boundaries, where it recrystallizes under 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 inch in length. Each is individually packaged, labeled, and barcoded for easy identification and storage. Selected and 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.