Smithsonite
| Refractive Index : 1.849 – 1.621 |
| Optical Characteristic : DR, U-, AGG |
| Specific Gravity : 4.30 (+0.15) |
| Formula : ZnCO3 |
| Crystal System : Trigonal |
| Variety/Species : smithsonite |
| Species/Group : calcite group |
| Birefringence : 0.225 to 0.228 |
| Dispersion : N/A |
| Hardness : 4 to 5 |
| Toughness : poor |
| Ultrasonic : Never |
| Steam : Never |
| UV Long : Inert to strong |
| UV Short : Inert to strong |
| Pleochroism : None |
| Strength : N/A |
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| Pleochroism Colors : None |
| Heat : sensitive |
| Acids : Avoid hydrofluoric acid |
| Light : stable |
| Polish Luster : vitreous |
| Fracture : splintery to uneven |
| Fracture Luster : Vitreous to dull |
| Clarity Type : N/A |
| Tones : N/A |
| Saturations : N/A |
| Cause of Color : Blue/green: copper; pink: maganese and cobalt |
| Enhancements : none |
| Cleavage : Perfect Rhombohedral |
| Color Range : Green, blue, yellow, brown, pink, white, colorless sometimes banded. Tones is often light. Yellowish, greenish, bluish, pinkish, whitish |
| Transparency : Transparent to semitranslucent |
| Phenomena : None |
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| Separations : Smithsonite from- Hemimorphite : RI, SG, birefringence, optic character/sign Datolite : RI, birefringence, SG, optic character Rhodochrosite : color, appearance, spectrum, SG Barite : RI, birefringence Jadeite : Appearance, SG, birefringence, spectrum Nephrite : Appearance, SG, birefringence |
| Identifying Characteristics and information High birefringence, high SG. Avoid chemicals, acids and rough handling. Green-white phosphorescence (rarely). |
| Spectral Data Not diagnostic. |
| Trade Names and Misnomers Aztec Stone Cadmium Smithsonite Calamine (M)(2) Copper Smithsonite Dry Bone Ore Galmei(2) Sacred Turquoise(M) Smithsonite Turkey Fat Ore Zinc Spar |
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