DuTwan said:

Just a visual crystal idea i had.

Only problem I see here is that it's not really that obvious what it is. Also I've never agreed with glowing crystals. Damn the cartoons and computer games! In fact I've never agreed with coloured crystals in general. The way I always imagined it, the crystal is essentially clear, and the colour of the blade would be dictated by the specific and unique internal nature of the crystal and revealed to the Jedi building it when it's first ignited.