プラチナ

ぷらちな
noun
platinum
1. platinum
The precious metal platinum, used in jewelry, industrial applications, and as an investment asset. In Japanese, also widely used figuratively to describe the highest-tier or most exclusive category of products, services, and membership levels.
I gave a platinum ring as a present.
If you become a platinum member, you can receive special benefits.
Tickets for that concert are platinum tickets — extremely difficult to get.

Usage: プラチナ is a loanword from Spanish/Portuguese "platina." It refers both to the metal and, figuratively, to the most exclusive or hard-to-get category.

Common collocations

Cultural note: In Japan, プラチナ is used as the top tier in loyalty programs and credit cards (above ゴールド/gold), and プラチナチケット has become a common expression for any highly sought-after, near-impossible-to-get ticket.