My SIL wants a white on white quilt, any suggestions?

Can she go shopping with you to pick out the fabric? That would give you a better idea of what she is looking for. Does she want any other color?
I saw a quilt on here that someone had done in white on white and beige... was beautiful

how would you see th pattern?

She only wants white.I wish she would let me put some color in lol.

Try a whole cloth quilt - the quilting shows up like an embossed pattern. The time saved on piecing can be spent on the quilting -- pick pretty design stencils & quilt it allover.
I have a store-bought quilt, (shudders) called mattelasse that is ivory w/ ivory thread & it's so gorgeous! One day.......

Decoratenu, I love your cats!!

Thanks! I love them, too! The mama & baby are both calico -- mama is normal, but baby is long-haired.
Dina, yours look sweet, too!

There are a lot of WOW fabric with different designs... the quilting could really stand out on just a simple quilt pattern :D:D:D