Gemstones, Weighed
Seventeen gem minerals by specific gravity, drawn to scale, with their hardness on the Mohs scale.
A jeweller's two quick tests are how heavy a stone is for its size and how hard it is to scratch. This chart puts seventeen gem minerals on one scale for the first and lists the second beside it.
Every figure is from the US Geological Survey's publication Gemstones, and the credit is printed along the foot of the chart.
Specification
| Item | Poster, unframed |
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| Sizes | 8 x 10 in, 12 x 18 in, 18 x 24 in |
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| Data | AVONET, Tobias et al. (2022), Ecology Letters, CC BY 4.0. See every figure and its source. |
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| Care | Unframed. Frame behind glass to keep it flat and clean. |
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| Shipping | United States and EU, dispatched in 3 business days |
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| Returns | Damaged or misprinted prints replaced or refunded within 30 days |
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