If you are on a tight budget, look at the UV lights that claim antibacterial properties. All of these (barring fraudulent advertising) are short wave. They may not be the precise BEST frequency but they operate in the prescribed ranges. I got BOTH for less than $30 combined. Build your own box. Needed: Cardboard box of appropriate size (your choice), a knife to cut access holes and FLAT Black spray paint.
Buy gemologist quality tools when you have money. You can “make do” quite nicely with less for now…
Regards