I am quite excited as the Vita finally arrived at the period where the fight between the Council of Apostles and the Emperor culminates, and a victory of Heideran V's forces is beginning to take shape. This would be the moment where the most precious relics would be transported to hiding places.
To understand what "most precious" means, it can be useful to keep the Theology Council's classification of relics in mind. The Council of Apostles, one and a half millennium ago, would have used the same classification. It comes in a two-dimensional grid, with on one axis the proximity of the relic to the saint during their life, and on the other axis the estimated authenticity of the relic.
First, the gradus proximitatus. Three levels are distinguished: the first grade consists of relics that are mortal remains of the saint (parts of the body) or an essential attribute - meaning an object with which the saint is always depicted with or associated with. There is a level even above this first grade - extraordinary objects that were in contact directly with God or the Sefrim - but one can academically discuss whether to call such objects relics at all. They are sometimes given their own category, the "dona extraordinaria".
The mid-grade of proximity are objects that the saint has used or touched during his life (excluding the essential attributes). These could, in the case of martyrs, even be the tools used to torture or kill the saint.
The lowest tier consists in objects that have touched relics of first grade. You can place prayer beads on a relic during your veneration of the relic. Taking your prayer beads home, these can still inspire you and grace you with the blessings of the saint! There is strong discussion about whether objects touching relics of the mid-grade should also be counted as third-grade relics or not, and this debate led four millennia ago to a war which ended in a stalemate and the unsatisfactory compromise formulated by the third council of Iphria, introducing a fourth grade of proximity. Up to this day, the matter has not been resolved conclusively and is the subject of intense academic research.
The other classification (the second axis) is the gradus veritatis. Archeologists and historians at the Theology Council will investigate every claim that a certain object is a relic, and establish its degree of verity.
After removing the items that can be be proven to be false, they will classify the remaining claims into again three categories. The highest level are those relics that can be proven - by scientific analysis or clear historical record - to really belong to the saint. The middle grade are relics that are likely to have belonged to the saint, but cannot be convincingly proven so. The third class is formed by relics for which there is reason to doubt whether they belonged to the saint.
Take as example a case where the saint in question was buried along with other persons in the same grave, and it cannot be resolved which bone belongs to which person. A bone from that grave would be first class in gradus proximitatus, but third class in gradus veritatis. At the same time, in superposition so to speak, it could also be classified as third class proximitatus for which it is first class veritatis.
Obviously, when in these logs I refer to the most precious relics, those would be relics of both high proximity to the saint and high degree of verity. And, regardless of semantic debate, I would include the dona extraordinaria.