This is an idea I've just come up with. I'm not sure if it has been done before. This is for 3.5e or maybe just fantasy in general.
The basic idea is Gemstones have powers that is tied to their alignment.
For example:
Lawful Good
Might have Pearls connected to it. The power of a pearl might add a bonus to Willpower saves because pearls are a symbol of wisdom. Willpower saves come from Wisdom. White is generally associated with good.
I'm not sure how to further develop this power any further though.
The basic idea is Gemstones have powers that is tied to their alignment.
For example:
Lawful Good
Might have Pearls connected to it. The power of a pearl might add a bonus to Willpower saves because pearls are a symbol of wisdom. Willpower saves come from Wisdom. White is generally associated with good.
I'm not sure how to further develop this power any further though.