Inner Mongolian quartz point pair Aquamarine Porcellio isopods often display sexual

Porcellio isopods often display sexual dimorphism

In images showing a right angle over the tower

This calcite specimen from Santa Eulalia has a layer of calcite druzy with several larger modified rhombohedral calcite crystals perched atop

The iron bands are harder than the surrounding sandstone and create ridges as the softer material is more quickly sandblasted away—just like the material would erode in nature

The pattern on it looks like a swirling galaxy

Inner Mongolian quartz point pair Aquamarine Porcellio isopods often display sexualLocale: HuangGangLiang mining district, Inner Mongolia, China Approx point length: 2. 5" Approx weight: 36g These quartz points are from HuangGangLiang, and commonly called Mongolian or Inner Mongolian quartz. This isn't your typically shiny quartz; this pair of straight points is completely coated in a grainy matte white mineral crust. Where the crust is broken off, exposed beneath is more matte white! The piece appears dull but will glitter like