Tugtupite

(Reindeer Stone)
Chemistry: Sodium aluminum beryllium silicate
Crystal system: Tetragonal; massive allied to sodalite; crystals rare.
Color: Various shades of red, from pale pink to violetish red and violet; may contain black needles or yellow spots; transparent materials rare, facetable material also found.
Hardness: 6.5
Cleavage: Massive: none; Fracture: granular
Specific gravity: 2.3 – 2.57; 2.3 depending on porosity and other minerals present.
Refractive index: 1.496 – 1.502; Uniaxial positive; 0.006 (0.004-0.006)
Luster: Vitreous to greasy
Dispersion:-
Dichroism: Bluish red; orange red
Occurrence: Red angular masses in Albite-rich hydrothermal veins; Greenland, Russia.

Notes
Found in 1960; ornamental stone may resemble rhodochrosite; massive is mottled white with shades of red; fluorescence: orange (LW), salmon (SW), bright red (UV); cabochon, carvings, beads.