Strontianite
| Refractive Index : 1.670 – 1.520 |
| Optical Characteristic : DR, B-, AGG |
| Specific Gravity : 3.785 – 3.630 |
| Formula : SrCO3 |
| Crystal System : Orthorhombic |
| Variety/Species : strontianite |
| Species/Group : Aragonite Group |
| Birefringence : 0.150 |
| Dispersion : 0.008 – 0.028 |
| Hardness : 3.5 |
| Toughness : Fair to poor |
| Ultrasonic : Never |
| Steam : Never |
| UV Long : Inert to moderate |
| UV Short : Inert to moderate |
| Pleochroism : None |
| Strength : N/A |
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| Pleochroism Colors : None |
| Heat : Avoid heating |
| Acids : Attacked by acids and/or chemicals |
| Light : stable |
| Polish Luster : vitreous to resinous |
| Fracture : Uneven |
| Fracture Luster : Vitreous to silky |
| Clarity Type : N/A |
| Tones : N/A |
| Saturations : N/A |
| Cause of Color : Yellow, brown, red – iron oxides ; blue/green – copper |
| Enhancements : none |
| Cleavage : perfect 1 direction. |
| Color Range : Colorless, White, gray, reddish, yellowish, brownish, greenish, whitish, grayish (usually light in color). |
| Transparency : Transparent to opaque |
| Phenomena : chatoyancy, (very weak) |
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| Separations : Strontianite from- Calcite : RI, SG, optic character, cleavage, birefringence |
| Identifying Characteristics and information High birefringence. SG may be higher due to lead impurities. May phosphoresce white (common). Rare. |
| Spectral Data not diagnostic |
| Trade Names and Misnomers Strontian Strontianite |
Tags: Aragonite Group, strontianite
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