Question

Why the dimond is more costly ?​

Answer 1

Diamond is so valuable because of its lustrous surface, rigidity and it is only formed in the high pressure.

Answer 2

Hey mate here is your answer :

Diamonds are not particularly rare. In fact, compared to other gemstones, they’re the most common precious stone found.

Generally, the cost per carat (or weight of a gemstone) is based upon a stone’s rarity; the rarer the stone, the more expensive. Therefore, rubies, emeralds and sapphires are much rarer and, in turn, far more expensive than diamonds.

hope it helps please mark my answer as the brainliest answer and press the thanks button