| Object ID |
1998.2.3 |
| Object Name |
Quartz |
| Accession# |
1998.2 |
| Description |
Amethyst quartz crystal from broken geode. Amethyst color is caused by the inclusion of trace amounts of ferric iron. Quartz is one of the commonest minerals of the earth's crust. It crystallizes directly from igneous magma. |
| Chemical Comp |
SiO2 (Oxide of Silicon) |
| The Major Collection Name |
Rocks and Minerals Collection |
| Crystal System |
Hexagonal |
| How old it might be |
Unknown |
| Formation |
Minas Gerais, Brazil |
| Found |
Minas Gerais, Brazil |
| Hardness |
07 |
| How new it might be |
1980 |
| Luster |
Vitreous |
| Material |
Mineral |
| Rock type |
Igneous |
| Specific Gravity |
2.65 |
| Surface process |
Weathering |
| Varieties/Occurrence |
Clear rock crystal, milky quartz, smoky quartz, amethyst, citrine, rose quartz |
| Weight |
155.925 |
|
