What is a Rainbow Opal?

Question

I see this item called Rainbow Opal in the market, but I cannot find any information about it. 

The details in game only provides information about its weight and nothing else.

Comments

This item was added on the summer update 2022, but we still don't have any information about it.

Answer 1

According to tibia.fandom.com this item is believed to be unobtainable (at least for now).
What else is that it provides light for 5 sqm in lightish blue colour so can be considered a source of light or valuable - similar to giant amethyst, giant emerald, giant ruby, giant sapphire and giant topaz.

These items also provides light in (I believe) same radius.

Since giant gemstones can't be equipped in bonus slot, Rainbow Opal probably won't be as well.