I like tortoise shell. Just bought myself a sheet to get a lefty pickguard for my P-bass clone (the standard Fender/Squier ones don't fit, neither do the GFS/TNT/etc..., so gots to make my own) Got this off e-bay for like 23 bucks CND: They call this 'magma' tortoise shell. Much prettier in person than the photos suggest. It's not a photo print, thankfully, but real swirl, and it does have a certain depth and translucence about it. Going to call up my local luthier and have her fashion me a pickguard, offer her the leftovers. She probably could finagle a few SG or Les Paul or even some archtop type pickguards. It's kinda of a shame that a P-bass doesn't have nearly an efficient footprint like a Jazz's. I could easily fashion a couple of Jazzes or even Teles from this sheet (43 cm x 29 cm) For those interested to get themselves a blank: http://www.ebay.ca/itm/Tortoise-She...AU_Instrument_Accessories&hash=item5d3baff3e6
I like it better for a bass- let the tortoise keep its shell. BTW: I've found some of the real stuff on the beach, and it's pretty, especially if back-lit, but not nearly as dynamic as the sheet above.
After seeing this, I bought a sheet from the same source. It IS pretty! When cutting the sheet, you get that familiar "vicks vapo-rub" nitrocellulose smell.