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Quartz [G8978]
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GeoFacts
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Photograph of six faceted quartz gems (G3697, G8978, G9742, G3592, G3879, and G5701) from the National Gem Collection displaying a range of colors Photo by Chip Clark |
Quartz
All quartz have the same arrangement of silicon and oxygen atoms. Because they grew under different conditions, they exhibit an incredible variety of shapes and colors. Impurities cause the distinctively colored gem varieties: rose quartz (pink); citrine (yellow or gold); amethyst (purple); and smoky quartz (black or brown).
Hover over color tiles above to learn what this object tells us about the history of the Earth
| Catalog # | Mineral | Country | Weight | |
|---|---|---|---|---|
| G3592 | Quartz (var. Rose Quartz) | Brazil | 374.90 ct | More info » |
| G3697 | Quartz (var. Smoky Quartz) | Brazil | 1695 ct | More info » |
| G3879 | Quartz (var. Amethyst) | Brazil | 1362 ct | More info » |
| G5701 | Quartz (var. Rock Crystal) | Brazil | 654 ct | More info » |
| G8978 | Quartz | Brazil | 2670 ct | More info » |
| G9742 | Quartz (var. Citrine) | Brazil | 2277.0 ct | More info » |
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