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Analcime (NaAlSi2O6·H2O) NS3870B |
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| Crystal system | isometric (3 axes of equal length at right angles with 4 threefold axes of symmetry). |
| Habit | granular but usually in crystallographic form which is trapezohedral or cubic modified with trapezohedrons. |
| Cleavage | none. |
| Fracture | subconchoidal. |
| Hardness | 5-5.6 |
| Specific Gravity | 2.27 |
| Color | colorless or white. |
| Luster | transparent to translucent with a vitreous luster. |
| Streak | clear/none. |
| Distinguishing features | its crystal form and vitreous luster; may obtain a slight electrical charge when rubbed or heated; dissolves easily in strong acids. |
| Uses | of interest to collectors and scientists. |
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