Permineralized Sparklewood - 2.729" collegefun Did the extinction happen rapidly

Did the extinction happen rapidly or was it the product of a long period of change in climate

and Peruvian Blue Opal

Most iconic shells exhibit a nearly perfect logarithmic spiral

50" on the longest edge

484" sample of Red Planet Obsidian set into a sterling silver bezel

Permineralized Sparklewood - 2.729" collegefun Did the extinction happen rapidlySparklewood is our fancy name for the glimmering, fossilized wood that comes from deposits near Zwenkau, Germany. It is truly a sight to behold and it comes in two distinct forms: Mummified and Permineralized. The Permineralized form is infused with so many druzy crystal inclusions that they shimmer in the light, while the Mummified form exhibits a deeper color that is subtle and contemplative. Both forms are incredibly light and beautiful. This