The Jewels called Nigrum
These jewels called Nigrum are capable of restraining the curses of beasts. They might be incredibly rare but can be found all over the world. The stones are very small, usually 1cm and maximal 2cm in width. Mostly cubic in nature but other forms were also found.
What these stones are made of specifically could not yet be determined as they are the densest substance known. Scientists could not find any similarities with other known elements even underneath microscopes. The stones cannot be altered in any way, mechanically, with acid or bases.
The stones come in various different colours. The only thing they have in common visually is that they contain tiny back spheres within themselves. The number of spheres per stone can vary as can the size. More or larger spheres does not mean any difference in strength of aid stone.
Each stone will only shield the bearer of a certain “type” of beast. What type exactly could for a long time only be determined by try and error but meanwhile, the searchers guild has developed tests that are capable of narrowing it down to a pretty decent result.
As these stones are so incredibly rare, there sadly are a lot of imitation stones going around. It is estimated that only 0.001% of the stones are actually real. Most stones that families keep in their home will probably not work if they get hit by a curse. However the believe in these stones is incredibly high and no one wants to not have one - even if fake.
Additionally these real stone will only slow down the curses reaction with a cursed person. They do not prevent it from happening in the first place. That misconception, despite being repeatedly told by the searchers guild, could not be corrected.
Jewelry
Cursed people usually wear the stones as jewelry around various body parts where the curse has the highest effect. There are curses that will influence hands and arms more, so wristband and rings are obvious choices.
Necklaces are for people with chest or shoulder problems, as well as breathing or heart diseases.
Most often you will see earrings as around 95% of the curses do influence the mind of the cursed person and try to bring it to submission over the curse. Necklaces work here too but earrings or even tiaras for seriously dangerous conditions, are more common.
Monuments
A certain type of Nigrum that does not repel any curses but the actual beasts is often used in monuments to protect villages and as clusters around cities can be used as an invisible wall.
These monuments however are only a temporary measure and will need lots of maintenance. Beasts will grow stronger over time or can become immune to the specific stone used.
It is again the searchers guild that builds and maintains these monuments.