no no, you seem to misunderstand me. i have a lightbox already. what i'm looking for is a FLASH box. meaning the flash is INSIDE the box and i sit the jewellery ON TOP OF the box.
i don't really know if this exists... but in theory (or in my own head) it makes sense to me that this + the studio lights that i already use, would give me a pure white background, because it is flashing behind the object, therefore giving me no shadows , and a perfectly white background, without interfering with the exposure of the piece of jewellery.
make sense?
You could try using a light table. I don't know where you would find a reasonably priced one, I googled it and came up with a few little light tables costing over $200-$300 and beyond (can you say ripoff?) but mostly guides on DIY light tables.