What Are the Rarest Gemstones? Discover the World’s Most Elusive Jewels
Gemstones have captivated humanity for centuries, not only for their dazzling beauty but also for their rarity and the fascinating stories behind their formations.
In short: The world rarest commercial gemstones include painite (Mohs 7.5-8, £30,000-£60,000 per carat), red beryl (Mohs 7.5-8, £8,000-£15,000), grandidierite (£15,000-£25,000), benitoite (£3,000-£8,000), and alexandrite (£4,000-£15,000 for fine colour-change). Red diamonds are even rarer — fewer than 30 certified gem-quality examples exist, reaching £750,000+ per carat. For comparison, a 1.00ct D/VS1 lab-grown round costs £1,400-£1,800 in UK 2025.
While diamonds often steal the spotlight, there exists a world of gemstones so rare that many remain unfamiliar to the general public.
These elusive treasures, formed under unique geological conditions, are highly sought after by collectors and enthusiasts alike.
In this article, we'll look at some of the world's rarest gemstones, exploring their origins, characteristics, and what makes them so exceptional.
Understanding Gemstone Rarity
The rarity of a gemstone is determined by several factors, including its natural formation, the limited geographic locations where it's found, and its availability in the market.
Some gemstones are rare due to the unique combination of elements required for their formation, while others are scarce because they are found in only one or two locations worldwide.
This rarity often translates to higher value and desirability among collectors and jewellery enthusiasts.
Painite: Once the Rarest Mineral on Earth
Discovered in Myanmar in the 1950s, painite was once considered the rarest mineral on Earth.
