Rhyolite Specimen, Rhyolite Specimen is aphanitic felsic rock, formed during eruptions of thick, viscous magma., Pack of 12

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Here is the corrected text: Rhyolite is an aphanitic felsic rock that forms during eruptions of thick, viscous magma. It often contains phenocrysts of felsic minerals with only slightly higher crystallization temperatures than the feldspar and quartz that form rhyolite. Great for geology classrooms, this rock is ideal for identification and classification exercises. The evolved chemistry of the rock makes it lightweight relative to other igneous rocks, making it a good identifier for classification. This set of 12 samples is excellent for group study and examination. Each specimen is selected and hand-processed by an actual geologist, ensuring that each sample exhibits defining features. Our rock and mineral samples are sourced from a variety of locations around the world and are processed in Victor, NY. Each specimen sample is packaged in a transparent bag, labeled, and barcoded for easy identification. Raw Rhyolite Specimen Set of 12 Samples, 1" in length: Rhyolite is an aphanitic felsic rock that forms during eruptions of thick, viscous magma. It often contains phenocrysts of felsic minerals with only slightly higher crystallization temperatures than the feldspar and quartz that form rhyolite. Ideal for teaching students about rounding and sorting, as well as for identification and classification exercises, this rock's evolved chemistry makes it lightweight relative to other igneous rocks - a good identifier for classification. While each specimen will vary slightly in shape, size, and color, it will measure approximately 1" 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.