4 The rarest and most expensive jewelry stones in the world

4 The rarest and most expensive jewelry stones in the world: One of the natural objects that humans always use to beautify themselves are stones crystal rock. it took millions of years to a crystal rock was formed. in order to be used as jewelry, the stones need to be shaped first. there are many types of crystal stones. Several well-known types of crystal stones such as diamond, ruby, emirald, and sapphire, the selling price of these crystal stones depends on several things, such as rarity, clarity, and so on. The following are 4 crystal stones that are very rare and have fantastic value, -TANZANITE: This type of crystal rock is only found at the foot of Mount Kalimanjaro, northern Tanzania. Tanzanite can appear to change color from purple to blue and vice versa. With very rare conditions, it is estimated that this stone will be completely mined in the next 20-35 years. The composition of this stone Tanzanite is calcium, aluminum, silicon, hydrogen and oxygen. Tanzanite price range is US $ 600-1000 US $ -BLACK OPAL: The rarest variant of the new opal which is the national stone of AUSTRALIA, almost all black opal in circulation comes from the lighting ridge mining, New south Wales. Dark basic colored stone with colorful patches -ALEXANDRITE: The name of this stone is taken from the name TSAR Alexander II Russia. At first this stone was thought to have been mined. This type of alexandrite stone was first discovered in 1830 in the Ural Mountains of Russia. -PINK STAR DIAMOND: Pink star diamond was first mined in 1999 in South Africa. weighing 59.6 carats, this stone sold at Sotheby's auction for US $ 83 million the composition of this rock is carbon.