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Prehnite
Prehnite
Mineral Properties and Uses
Physical Properties of Prehnite |
| Uses |
ornamental material, semiprecious gem |
| Color |
white, green, gray, yellow |
| Streak |
white |
| Luster |
vitreous |
| Diaphaneity |
transparent to translucent |
| Cleavage |
basal |
| Mohs Hardness |
6 - 6.5 |
| Specific Gravity |
2.8 - 3.0 |
| Distinguishing Characteristics |
color, cleavage |
| Crystal System |
orthorhombic |
| A cabochon of prehnite from Brazil. This gem is 3 carats, and approximately 10 millimeters by 8 millimeters. |
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| Beads of prehnite. Each bead is approximately 6 millimeter across. |
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