Black Call Of Cthulhu Dice Bag

It is said that the person who analyzed this black material the bag is made of disappeared. All that was found were some notes mentioning some long gone civilization and that the sign on the bag would protect all the items inside.Who knows what secrets or knowledge it holds?

Call of Cthulhu Black & green Dice Bag dimensions:
approx. 11 cm (4.34") x 12 cm (4.72") x 0,5 cm