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Zircon (ZrSiO4) NS3228B |
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| Crystal system | tetragonal. |
| Habit | stubby and prismatic or dipyramid crystals. |
| Cleavage | poor. |
| Fracture | conchoidal. |
| Hardness | Hardness- 7.5 (very hard) |
| Specific Gravity | 3.9-4.8 |
| Color | colorless, tan., yellow, brown, gray or green. |
| Luster | adamantine, opaque or dull. |
| Streak | uncolored. |
| Distinguishing features | easily recognized by its color, weight, luster, hardness and crystal form. |
| Uses | colorless zircons have been used as gemstones. |
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