This sphere is just magic, displaying a wonderful moving star. This is an amazing combination of geometry and physics with the sphere acting as a natural 360-degree lens, showcasing a mesmerising double star in places that floats across the surface as microscopic parallel needle structures reflect a single light source into this star pattern, while the crystal's signature trait of double refraction splits the light into twin overlapping images casing the double star to appear.

Calcite grows in an trigonal crystal structure, because of this Inside this sphere, there are microscopic, parallel structural lines that aligned themselves along the crystal's natural axes as it formed so when a single point of light shines on the sphere, these internal lines act like tiny mirrors. They scatter and reflect the light into long perpendicular lines forming the four armed star.

The reason you see two stars overlapping or sitting right next to each other is a trait of optical calcite called birefringence, or double refraction.
Calcite is structurally asymmetrical so when unpolarized light enters the crystal, the calcite forces the light to split into two separate paths.

Optical Calcite is known for its ability to bring clarity, perspective and mental focus, helping to shift the way you see and understand situations. It is often used to clear confusion, support insight and bring a sense of order to scattered thoughts, making it particularly helpful during times of decision making or change. đź”®

Some Properties of Optical Calcite:

Consciously Sourced
Comes with a sphere stand

Weight: 833g
Diameter: 8.2cm