Obsidian, also known as volcanic glass, forms from lava that cools almost immediately upon eruption, usually into water. Excellent for classroom mineral study and identification. Obsidian shares many physical properties with its major chemical component, quartz, despite looking dissimilar - great for classification exercises. While each specimen will vary slightly in shape, size and colour, it will measure approximately 1" in length. Each is individually packaged, labeled and barcoded for easy identification and storage.
- Every specimen is selected and hand processed by an actual geologist, ensuring that each sample exhibits defining features
- Obsidian shares many physical properties with its major chemical component, quartz, despite looking dissimilar - great for classification exercises
- Set of 12 samples, excellent for group study and examination
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