Farmer could be some sort of fabric pattern, with a hint of green.
Source Fabian Schultz
This pack of filters can help you adding a blocky overlay to objects. May come handy at drawing blocks of stone.
Source Lazur URH
From a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
Based on several public domain drawings on Wikimedia Commons. This was formed from a rectangular tile. The tile can be accessed in Inkscape by selecting the rectangle and using shift-alt-i.
Source Firkin
The square tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
A seamless web texture of "green stone".
Source V. Hartikainen
Dark squares with some virus-looking dots in the grid.
Source Hugo Loning
Drawn in Paint.net and vectorised in Vector Magic.
Source Firkin
I scanned a paper coffee cup. You know, in case you need it.
Source Atle Mo
Prismatic Isometric Cube Wireframe Pattern No Background
Source GDJ
An orange vertically striped background pattern. Feel free to download and use this orange background pattern, for example, on the web). It resembles a wallpaper with vertical stripes or something similar to it.
Source V. Hartikainen
Remixed from an image that was uploaded to Pixabay by Pixeline
Source Firkin
Derived from an image that was uploaded to Pixabay by Darkmoon1968
Source Firkin
That’s what it is, a dark dot. Or sort of carbon looking.
Source Tsvetelin Nikolov
A very slick dark rubber grip pattern, sort of like the grip on a camera.
Source Sinisha
Remixed from a drawing in 'Analecta Eboracensia', Thomas Widdrington, 1897.
Source Firkin
Nothing like a clean set of bed sheets, huh?
Source Badhon Ebrahim
Like the name says, light and gray, with some small dots and circles.
Source Brenda Lay
A very dark asfalt pattern based off of a photo taken with my iPhone.
Source Atle Mo
Prismatic Groovy Concentric Background 3
Source GDJ
Horizontal and vertical lines on a light gray background.
Source Adam Anlauf
A background tile for web with abstract repeating texture of dark "stone wall".
Source V. Hartikainen