Orange chalcedony geode with square formation Quartz Broken or polished pieces can

Broken or polished pieces can have lovely colors similar to low-quality petrified wood or jasper

I call this one "the pie chart": one quarter matrix

In this case the thousand layer growth is a pinkish hue tinged with white

The different types of chlorite inclusions are colored by other trace elements to produce muted tones of green

but these "coprolites" are an inexpensive conversation piece—and always a great gift for kids

Orange chalcedony geode with square formation Quartz Broken or polished pieces canLocale: Atlas Mountains, Morocco Approx dimensions: 4 x 3 x 1. 5" Approx weight: 308g Typical stalactitic chalcedony is like a small cave lined with stalactites, botryoidal forms, and swirling agate patterns. This one lacks all of those lovely features so of course I was going to snatch it up. I've seen similar nested box shaped formations explained as pseudomorphs or perimorphs after cubic minerals, but that doesn't seem to apply here where the