First of all, tombstone is a way for the living to express their respect and nostalgia for the deceased, and it is also a record and inheritance of the deceased's life. Traditionally, people think that tombstones can represent the status and prestige of the deceased in another world, so the quality and material of tombstones may have a certain impact on future generations.
However, the natural reddening of tombstones is only a superficial phenomenon and will not have any impact on the fate of future generations. The material, color and shape of tombstones are only related to personal preferences and budgets, and have nothing to do with the fate of future generations.
Therefore, we should respect and miss the deceased, and at the same time, we should rationally treat the choice and significance of tombstones and other souvenirs. Don't be overly superstitious, but choose appropriate ways to express your memory and respect for the deceased according to your own beliefs and concepts.