Here is the information I have gathered on purple crystals. It's a bit of a mess in my room, sorry for the delay.

The older the purple crystal, the bigger; the bigger, the more healing power it contains.

I've also come up with four theories on how they grow.

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Positive Creationism

This theory is based on the possibility that positive energies can be found in the wild; positive energy has the potential to heal. This energy in a reaction, would accumulate at a specific location, creating a solid version, the purple crystal.

Flaw: What is required to make a new crystal?

Experiment: If it is indeed true, then increasing the concentration of positive energy in its environment should, in fact, improve the growth.

Thus, a healing spell should be cast regularly on a shard, and note any difference after a while.

Positive Alterism

This theory is similar to Positive Creationism, however the main difference is that positive energy does not create a crystal, but rather changes a specific crystal into a purple crystal.

Flaw: What is the base crystal?

Experiment: A gathering of several crystals, each force-fed with positive energy and note any differences.

Plant Theory

Purple crystals act like plants; they require soil and water. They do not breathe, they do not move, and they do not interact.

Flaw: How do they reproduce?

Experiment: Planting a purple crystal and treating it like a plant. Note any differences.

Balance Theory

A more fantastic theory, but possible in this world of magic. The Underdark is known for great evil. To balance it, those crystals grow, as they can be tools of good.

Flaw: Good and Evil can be subjective.

Experiment: Set a crystal in an environment of reknown goodness, and note any differences.

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A personal favorite is the positive creationism; it does seem to fit with the ley-lines theory of growth. I was also told any kind of energy is present in the environement; like the positive energy one.

Also, the most favorable environment for growth is nearby a nexium -an intersection of ley-lines. Although I've no proof of it, I'm willing to believe the druid. Also, this is the reason I intend to make the farm near one of those.

I think that's about it -as I said, it's a mess in my room.

I know you know the Toboerski, and I'll be honest. This is not for profit -under no way whatever comes out of this will be mark by the Toboerski. I'd actually even prefer you do not even mention of this project to them.

Philip