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making them one of the dominant large mammals of their time
Hexagonellidae (Ordovician-Permian)
a specialized feeding organ unique to the group
moving in a serpentine fashion
nearly circular bodies
4.1" Rough Purple Amethyst Crystal Cluster Mineral Specimen Brazil Davidia Antiqua making them one of theLocation: Brazil Weight: 4. 8 Ounces Dimensions: 4. 1 Inches Long, 2. 1 Inches Wide, 0. 9 Inches Thick The item pictured is the one you will receive. Amethyst Brazilian amethyst is a stunning purple quartz crystal prized for its vivid color, clarity, and naturally beautiful formations. A variety of quartz (SiO), its signature purple hues arise from trace iron and natural radiation during crystal formation. Brazil is a leading source of high quality
