【Tokyo, Japan】37 Billion Yen Pink Diamond Theft Case Brings Renewed Attention! The ‘Asset Opportunity’ Hidden in Diamonds

Editor’s Note

This article highlights the soaring investment appeal of pink diamonds following the closure of Australia’s Argyle mine, while also underscoring the significant security and management challenges that accompany such high-value assets.

The Astounding Value Demonstrated by Pink Diamonds

According to reports, the stolen pink diamond was valued at an extremely high price of approximately 3.7 billion yen. Since the closure of the Argyle mine in Australia, its largest source, in 2020, production has plummeted. Due to its heightened rarity, market prices continue to rise, and it is gaining attention as an investment asset.
However, this incident also highlighted the reality that high-value gemstones are difficult to store and manage, carrying risks such as theft.

None
‘Overlooked Assets’ Sleeping in Jewelry Boxes

“Purchased long ago and never used,” “Inherited from parents, but its value is unknown” – such gemstones might be lying dormant in jewelry boxes at home. In recent years, it is not uncommon for gemstones that were undervalued at the time to fetch unexpectedly high prices due to soaring market values.

Reliable Appraisal and Purchase at ‘Omoio’
None

The store employs appraisers certified by the GIA (Gemological Institute of America). Each piece of jewelry is carefully appraised based on internationally recognized standards and the latest market data.
It handles a wide range of items, from pink diamonds to colored diamonds, colorless diamonds, rubies, sapphires, emeralds and other colored stones, as well as gold/platinum products and brand jewelry. Appraisal and cancellation fees are completely free, allowing customers to check the value with peace of mind.
Now is an excellent opportunity to reassess the value of jewelry lying dormant at home.

None
Full article: View original |
⏰ Published on: August 20, 2025