18/04/2026
If you’re looking for the "rare of the rare," the world of mineralogy has some entries that make diamonds look like common gravel. Here are five of the rarest crystals on Earth, ranging from "hard to find" to "literally only one exists."
1. Kyawthuite
This is currently the rarest mineral in the world. As of 2026, only one single specimen has ever been found. It is a small, 0.3-gram deep orange crystal discovered in Mogok, Myanmar. If you want to see it, you have to visit the Natural History Museum of Los Angeles County, as it is truly one-of-a-kind.
2. Painite
For decades, Painite held the Guinness World Record for the world's rarest mineral. Until the early 2000s, only two crystals were known to exist. While more have been discovered recently in Myanmar, facetable, gem-quality crystals remain incredibly scarce.
• Color: Deep red to brownish-orange.
• Fun Fact: It contains both Boron and Zirconium, a chemical combination that rarely happens together in nature.
3. Red Beryl (Bixbite)
Often called "Red Emerald," this crystal is found in gem quality only in the Wah Wah Mountains of Utah, USA. It is estimated that for every 150,000 gem-quality diamonds found, only one Red Beryl is uncovered.
• Rarity: It is roughly 1,000 times more valuable than gold.
• Appearance: A stunning, saturated "raspberry" red.
4. Grandidierite
First discovered in Madagascar in 1902, this bluish-green stone is exceptionally rare, especially in "eye-clean" (transparent) form. Most specimens are translucent or opaque.
• Properties: It is trichroic, meaning it can flash three different colors (blue, green, and white) depending on the angle you view it from.
• Value: High-quality transparent stones can fetch up to $20,000 per carat.
5. Taaffeite
Taaffeite holds a unique place in history: it is the only gemstone to be identified after it had already been cut and polished. Richard Taaffe bought a "spinel" from a jeweler in 1945 but noticed it refracted light differently.
• Source: Found primarily in Sri Lanka and Tanzania.
• Rarity: If you filled a bucket with all the Taaffeite ever found, it wouldn't even be half full.
Note: Because these are so rare, they are seldom found in standard jewelry stores. Most reside in private collections or museums. If you see "Painite" for $20 on a marketplace, it's almost certainly a fake!