These Jars are specifically made to hold Hydrofluoric Acids.
 
HF Jars are made of high quality materials. Great for cleaning Diamonds that has any dirt, grime or even pen marks on them. This is a "cold"cleaning procedure which can take 30 minutes to and hour, depending on how dirty your stones are. Once you are complete your stones should look beautifully and shiny.
 
Please make sure to have wear when handling acids. Make sure to use apron, gloves, mask and even eye protection.