There are no more of them

The rarest mineral on our planet is kyavtuite. Only a small grain of brown tint was found; weighs only one-third of a gram, or 1.61 carats. At first glance it can be confused with amber or topaz. It was even thought to be scheelite for a while, but after research, it turned out to be a completely new mineral that has never been seen before. Its chemical formula is BiSbO.₄It is a bismuth antimonate, 24 Channel reported with reference to ScienceAlert.

The stone was purchased by gemologist Kyau Tu from the market of Chaungji city in Myanmar in 2010. Believing it to be scheelite, he began the purchase, but when he finished and cut the stone, he realized that something unusual was in front of him.

Unable to match the mineral to anything known, he sent it to the Gemological Institute of America (GIA) laboratory in Bangkok, Thailand. There, experts realized that they were faced with something that had never been seen before in nature.

This is the first case in the world. Not available in other countries
Tu said in an interview with The Myanmar Times in 2016.

We know very little about the stone itself. It has a rich orange color with a red tint and white veins. It also has hollow, tubular inclusions called veins that form under shear stress, indicating its natural formation.

Geologists believe this most likely of magmatic origin and was part of a common volcanic rock called pegmatite. Like granite, pegmatite is similar in composition to fruit cakes mixed with various minerals. Pegmatite, which is very common in this region, often contains large crystals of various precious stones.

Traces of titanium, niobium, tungsten, and uranium at Kyawtuit are consistent with pegmatite formation. Additionally, laboratory experiments show that bismuth antimonite crystals form at high temperatures corresponding to the temperatures of cooling magma.

Since the mineral is so rare, it is likely that there were special conditions for its formation, but we do not know exactly what it is.

Now Kyavtuit has no price because it is considered priceless.. The painite mineral, the second rarest gemstone in the world, is worth between $50,000 and $60,000 per carat.

The only known piece of Kyawtuit in the world is currently kept in the National Museum of History in Los Angeles, USA. After processing, the tiny stone measures only 5.8 x 4.58 x 3 millimeters.