My thoughts about the relic:
1. It won't be carbonate. Carbonate will release carbon dioxide to form oxide at high temperature, and its hardness will not be very high.
2. There is a sentence under the entry of "relics" in Baidu Encyclopedia, "At present, there are many patents for the manual production of" Phosphate Beaded Ashes "of relics in Taiwan Province and other places". I don't know if you have noticed it, which means that ordinary people can completely burn relics, even pigs, cows, horses and sheep in theory. It should be this thing to make treasure beads with more than 8 US dollars of Korean ashes.
3. "The saria hardness of Sakyamuni is 5.6, and the others are all 7.8." I think that Sakyamuni is a sinter, and the 7.8 is a crystal formed after the conditions are improved and the temperature of burning the corpse is increased. The so-called true relic with hardness of 6.5~7 should be a sinter, and the hardness cannot guarantee consistency.
4. In the explanation of "relic flower" under the entry of "relic" in Baidu Encyclopedia, "Thailand supplies 36 tons of relic flower to China every year" means that Thailand can "buy" relic flower.
5. The so-called relic is harder than a diamond, and the hammer can't break it, and the egg will rot when it is knocked. It's absolutely nonsense, and the bastard's trick to cheat SB.