4.7" Rough Purple Amethyst Crystal Cluster Mineral Specimen Brazil Self Standing Glyptodon Most Paleozoic crinoids attached themselves

Most Paleozoic crinoids attached themselves to ocean floor substrates

which consists of stiff branches interconnected by narrower crossbars called dissepiments

and the dramatic color contrast when intergrown with peach Stilbite or orange Mordenite matrices

Trilobites occupied a wide range of marine environments and played an essential role in early ocean ecosystems

featuring a high refractive index and the ability to show double refraction as light moves through it

4.7" Rough Purple Amethyst Crystal Cluster Mineral Specimen Brazil Self Standing Glyptodon Most Paleozoic crinoids attached themselvesLocation: Brazil Weight: 2 Pounds 5. 4 Ounces Dimensions: 4. 7 Inches Long, 4. 5 Inches Wide, 3. 1 Inches Thick The item pictured is the one you will receive. Amethyst Amethyst is a naturally occurring purple variety of quartz celebrated for its striking color, crystal formations, and long standing popularity as a gemstone. Composed of silicon dioxide (SiO), amethyst forms under specific geological conditions that allow iron impurities and natural