Purple, Red, or Roman Imperial Porphyry
Purple, red, or Roman Imperial porphyry refers to reddish to purplish porphyritic rocks highly-priced during the antiquity age by Romans
Purple, red, or Roman Imperial porphyry refers to reddish to purplish porphyritic rocks highly-priced during the antiquity age by Romans
Would you like to know how to open a geode? The common ways are smashing it, using a crack hammer
The best places to find geodes in Illinois are Warsaw, Hamilton, and Nauvoo, which are areas in western Illinois that
Geodes are hollow or partially filled, roughly spherical structures, globular or oblate spheroidal discrete bodies or structures lined with mineral
Is your question how are geodes formed in nature? The simple explanation is the process involves 1) cavity formation and
Since they resemble each other, it is good to discuss geodes vs. thundereggs, nodules, vugs, concretions, and other similar structures
Lithophysae (singular lithophysa) are roughly spherical to lenticular-shaped structures with onion-like shells and a hollow center. These structures, which occur
Diorite is a coarse-grained intermediate plutonic rock. Intermediate are rocks whose composition lies between felsic and mafic. Felsic rocks are
Both diorite and gabbro are coarse-grained rocks. They both form from the slow cooling of magma. This slow cooling allows
Spherulites are small, spheroidal, or globular structures common in glassy volcanic rocks. These bodies have dense masses of tiny, fibrous,