noun
platinum (Pt)
The chemical element platinum. Often used in contexts such as jewelry, industrial catalysts, and investment.
See also: プラチナ
この指輪は白金でできている。
This ring is made of platinum.
白金は希少な貴金属だ。
Platinum is a rare precious metal.
The kanji 白 (white) and 金 (metal/gold) combine to mean 'white metal', a descriptive name for platinum. The reading はっきん is the on'yomi.