Nice cabinet-sized specimen of sodalite var. hackmanite, from a recent find in the District of Sudbury, in Ontario, Canada. It is associated with feldspar (dull red SW), and some blueish-white fluorescing calcite. Small dots of a bright yellow fluorescing unknown (likely zircon, possibly apatite) show up under MW & SW; and some red unknown (possible calcite) shows up under MW. The hackmanite is nicely tenebrescent upon exposure to all wavelengths (darkest upon SW & MW exposure).
In the slideshow below, are shown, respectively: longwave UV fluorescence, LW tenebrescence, MW fluorescence, SW fluorescence, SW tenebrescence and lastly, natural color.
Size: 11,7 cm X 6 cm X 3,4 cm