Install Python 3.x if you don't have it.

Get Visual Studio Build Tools from here.

Install it with "C++ Desktop Development" marked and restart your PC.

Win+R, input "cmd", click Run, input "pip install web3" and hit "Enter".

Unzip the zip file from Releases.

Edit raritygems.py, fill your address, private key and gems kind in it.

Double click loop.py and mining started (There's no output).

Ex. If you want to random the salt, just open raritygems.py and replace "./main.exe" to "./main-rand.exe".