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| Mineral information | Link to the mineral in Minerals A-Z |
| Chemical composition | Displays the chemical formula of the gemstone. |
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| Color | Describes the color of the gemstone |
| Hardness | Describes the hardness of the gemstone in accordance with Mohs scale (1-10) |
| SG | Describes the Specific Gravity (density) of the gemstone. Specific gravity is measured by the relative comparison weight of water. For example, if a gemstone has a specific gravity of 3.6, than that mineral is 3.6 times heavier than water. |
| RI | Describes the Refractive Index of the gemstone |
| DR | Describes the Double Refraction of the gemstone |
| Luster | Describes the luster of the mineral |
Additional
information on the gemstone is displayed below:
USES
Describes
the uses of the gemstone
VARIETIES
Lists
the varieties of the gemstone with a short description of
each variety
FALSE NAMES
Lists
false names really applied to other gemstones. For
example, Elie Ruby is not a type of ruby, but
rather pyrope garnet.
SIMILAR GEMSTONES
Lists
gemstones that may be confused with the selected
gemstone, and briefly discusses how to distinguish them.
ALSO SEE
Hyperlinks
to other reference material.
PICTURES
Pictures
of the gemstone in a cut or polished state, as well as a
description of the picture.
