Hauynite
| Hauyne or Hauynite |
| Refractive Index : 1.505 – 1.496 |
| Optical Characteristic : SR |
| Specific Gravity : 2.40 – 2.50 |
| Formula : (Na,Ca)4-8(AI6Si6)O24(SO4,S)1-2 |
| Crystal System : Cubic |
| Variety/Species : Hauyne |
| Species/Group : Sodalite Group |
| Birefringence : N/A |
| Dispersion : N/A |
| Hardness : 5.5 to 6 |
| Toughness : Poor |
| Ultrasonic : Never |
| Steam : Never |
| UV Long : Inert |
| UV Short : Inert |
| Pleochroism : None |
| Strength : N/A |
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| Pleochroism Colors : None |
| Heat : Sensitive |
| Acids : Sensitive |
| Light : Stable |
| Polish Luster : Vitreous to greasy |
| Fracture : Uneven |
| Fracture Luster : |
| Clarity Type : N/A |
| Tones : N/A |
| Saturations : N/A |
| Cause of Color : |
| Enhancements : None |
| Cleavage : Distinct in 1 direction |
| Color Range : Blue, white, gray, green, yellow, red, greenish, bluish, grayish, yellowish, pinkish, reddish, whitish |
| Transparency : Transparent to Opaque |
| Phenomena : None |
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| Separations : Hauyne from- |
| Identifying Characteristics and information Hauyne is a major constituent of Lapis Lazuli. As a distinct gem species it is rarely seen. Deep blue faceted gem are extremely beautiful but also extremely rare. Mainly cut for collectors. |
| Spectral Data Not diagnostic |
| Trade Names and Misnomers Hauyne Hauynite |
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