Platinum is the rarest precious metal in the world. In the world, it can only be mined in a few places (mainly South Africa and Russia). If all the platinum in the world is poured into an Olympic standard swimming pool, its depth is not enough to cover the instep. Platinum is very rare and precious, 30 times rarer than gold.

Platinum has outstanding characteristics that other metals can't match: high density, toughness and wear resistance, and stable performance in various extreme environments, so it can remain as white as ever and never fade with time.

However, K gold is only a metal mixed with some gold, but because the hardness of K gold is higher than that of gold, many diamond rings will use K gold as a ring holder, so that the ring is not easy to deform.