This opaque mineral is hematite with minute silvery specs of hematite on the surface of the stone. These reflective specs are the specular hematite with specular meaning having the properties of a mirror.
With the minute inclusions having a metallic lustre, with the reflection of light they sparkle incessantly.
Specular hematite which is also known as specularite is a very soft mineral so pieces are often covered with a film of resin. The surface of this piece has been highly polished to create a glass-like finish more correctly known as a vitreous lustre.
With the reflection of light it looks like there's a layer glitter just beneath the surface of the stone. If you're familiar with goldstone, the surface of specular hematite has a very similar appearance but unlike goldstone which is a man-made material, it's completely natural.
The subtle red hue that can be seen in our second photo is from the hematite. This mineral's streak is red which is how the name hematite came about. Hema or more correctly haema comes from the Greek word for blood.
This specular hematite mineral stands without support on two of its four sides.