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| The bluest aquamarines are called 'maxixe' (don't ask me how that is pronounced). Maxixes fade to white in sunlight or when heated. |
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| Peridot can be found in some meteors. |
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| Like many gems, topaz comes in a bewildering variety of colors. The rainbow-hued center specimen here is 'mystic topaz', which is colorless topaz that has been artifically treated.* |
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| Black Opal isn't very black, but its background hue is much darker compared to other opals (see below). |
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| Also called Violet Sapphire, this gem is much harder than the occidental Amethyst. A near-colorless version is difficult to distinguish from diamonds. |
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| Also called Yellow Sapphire. When rubbed or heated the Yellow Topaz can generate an electrical charge. |
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| Occasionally one can find insects entombed in this fossilized tree resin. What if that fly was a shape-shifted devil? |
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| Only three alexandrites are depicted here. The top row shows the gems in sunlight, the bottom row in artificial light. |
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| There's a bright green variety of garnet called Uvarovite. |
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| Green is the most common color for jade but it comes in a variety of other colors. |
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| Jet is actually a form of fossilized wood that decayed under great pressure. |
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| Rose-hued spinels are sometimes called Balas Rubies. |
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| Pink tourmalines found in nature have been subjected to radiation at some point in the past. |
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| According to wikipedia when the inclusions are primarily yellow instead of red the stone is sometimes called a Plasma. But if I told my players they found a Plasma Stone they would assume it could shoot beams of ionic energy or something. |
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| Cairngorm is a specifically Scottish variety of Smoky Quartz and is normally listed under that category in the charts. It's a cool name with a specific look, so I gave them their own category here. |
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| Darker, harder carnelians are often called Sard (see below). |
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| Morion is a particular dark or even opaque variant of Smoky Quartz (see below). |
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| Onyx comes in a variety of colors but black is common. |
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| I could see a scenario where folks not well versed in gemstones could be tricked into thinking a cut rock crystal was actually a diamond. |
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| A darker, harder variant of carnelian. |
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| Sardonyx is literally layers of sard and onyx. |
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| This is just plain cool. |
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| "Heating destroys azurite easily" - Wikipedia |
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| Those shiny black rocks in gift shops that are magnetic and stick together? I'm pretty sure that's hematite. |
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| Used by the ancient Egyptians for scarabs. |
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| "when cut in one direction it is jet black; in another it is glistening gray" - Wikipedia again |
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| A blue variant is called Hawk Eye. |
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