“Really nice small cabinet specimen of tugtupite (bright cherry red), chkalovite (pearl-white and blueish-white) and analcime (blue), with areas of bright uranyl-activated green fluorescence, shown here fluorescing under shortwave UV. This recently acquired specimen is currently my favorite among my Greenlandic fluorescent minerals; I really like how well balanced the colors are. Shown in the second picture is the phosphorescence of the tugtupite upon exposure to SW UV; note how the phosphorescence is visible mostly in the solid grains of tugtupite. In the areas where tugtupite is present only as a thin replacement rim around chkalovite, the phosphorescence is much weaker and these thin rims are not tenebrescent. In the next pictures, are shown, respectively: midwave UV and longwave UV fluorescence, then the specimen in visible light, then closeups (SW, MW & LW UV, then visible light). ”

“Phosphorescence of the tugtupite upon exposure to SW UV; note how the phosphorescence is visible mostly in the solid grains of tugtupite. In the areas where tugtupite is present only as a thin replacement rim around chkalovite, the phosphorescence is much weaker and these thin rims are not tenebrescent. ”

“Midwave UV response. Under this wavelenght, the color of the tenebrescent solid tugtupite grains shifts to a pinkish red color; and the tugtupite that occurs as thin replacement rims around chkalovite fluoresces orange. The response of the chkalovite shifts to a yellowish white color. ”

“Longwave UV response. As usual, this is the less colorful response; however the fluorescence is still quite bright. ”

“Specimen shown in visible light. ”

“Shortwave UV response - closeup ”

“Midwave UV response - closeup ”

“Longwave UV response - closeup ”

“Closeup picture in visible light. ”