It helps many minor skin problems because it is a great cleanser of the blood.
Witches were always being asked to get rid of warts, boils, and pustulations.
Those on the photo are long gone, and just examples, I make replacements as they sell. I have both red calcite and honey calcite - I use both, both are just as good
Measurements are approx. ..3cm x 2cm sometimes a it bigger, not usually smaller.