Fluorite from Rogerly England is amazing, it is clear green in indoor light - with a longwave or shortwave UV light it fluoresces a bright purple, and indirect sunlight, the edges of the crystal turn a dark blue.. see all three pictures.

This piece is 4” at the longest section, 4” wide 1.5” deep

There are also small magnetite crystals interspersed with the fluorite crystals

Comes with a stand