Tugtupite
| Refractive Index : 1.502-1.496 |
| Optical Characteristic : DR, AGG |
| Specific Gravity : 2.36 +.22 -.06 |
| Formula : Na4AIBeSi4O12CI |
| Crystal System : Tetragonal |
| Variety/Species : Tugtupite |
| Species/Group : Sodalite group |
| Birefringence : Not detectable |
| Dispersion : none |
| Hardness : 4 to 6.5 |
| Toughness : good |
| Ultrasonic : risky |
| Steam : Risky |
| UV Long : Moderate to strong |
| UV Short : Modarate to strong |
| Pleochroism : None |
| Strength : N/A |
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| Pleochroism Colors : None |
| Heat : Avoid heating |
| Acids : Avoid pickling acid |
| Light : stable |
| Polish Luster : vitreous |
| Fracture : conchoidal to uneven |
| Fracture Luster : Vitreous to greasy |
| Clarity Type : N/A |
| Tones : N/A |
| Saturations : N/A |
| Cause of Color : Color centers |
| Enhancements : None |
| Cleavage : distinct |
| Color Range : Pink, red, blue, usually mottled with white, gray, or black. Most often pink to red. Light blue material is very rare. |
| Transparency : Translucent to opaque |
| Phenomena : Tenebrescence |
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| Separations : Tugtupite from- Natural Opal : Appearance, RI(spot reading), SG, fluorescence |
| Identifying Characteristics and information Coloring is usually mottled. Also known as “Reindeer Stone”. May fluoresce moderate to strong orange(LW) or organish red(SW). May phosphoresce. |
| Spectral Data Not diagnostic |
| Trade Names and Misnomers Beryllium Sodalite Reinder Stone Tugtupite |
Tags: Sodalite Group, Tugtupite
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