NEW EDIT. I took a sharp knife and scratched at the orange/amber area. The area the blade tip went across would develope a faint white mark; however if I licked my finger and wiped the mark it disappeared with no visible scaring or trace. I attempted to mark the rock at various pressures until I was pushing so hard knife would skip and I stabbed into the wood work bench a 1/2". No matter the pressure results were the same.
Old..... I founde digging through piles of river runoff dirt/rocks that were removed after flooding from farm land. It was originally located in Central Iowa, Story County, USA.
In natural light the Orange/Amber color appears much brighter. Stone is wet from washing. Pictures are of the front (2); then the back (1).
I am new to this but believe it is something inside quartz. Please help educate me!