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 6-1/2” at the longest section, 4-1/2” wide 2” deep

There are also small magnetite crystals interspersed with the fluorite crystals

Comes with a stand