HERE for a post about how to do this.) Counter-clockwise from front left is an image from the Internet of an old German psalter, next is an image of some ancient Tibetan texts, and the sheet at the back is a paisley pattern I purchased from Valeriane Digital on Etsy.
I've really been into the idea of using old text on my metal. Etching is frankly a pain, and when my friend suggested I make some texture sheets, this sounded like a great way to save myself some work. It's pretty easy to just anneal a piece of metal and hammer it on top of a texture sheet, and one of the bonuses is you can emboss really thin metal if you want, whereas you can't really etch very thin gauges and have it turn out nice. These discs (which are going to be petaled caps for pendant focals) are 26 gauge:
Here on the left, you see the text as it comes out of the printer on your transparency sheet, toner side up like a regular printed document. On the right, it's been flipped over so the toner is facing the metal, ready to be ironed on. And hence your backwards etched image.