its Top blue color from all natural gemstones , and more rare then others blue color  others blue color gemstones,  others blue color : tanzanite , blue spinel, sapphires...  natural no treatment no heat type. 

 Haüyne is a rare silicate mineral that is highly valued for its stunning royal blue color. It is considered a gemstone and is sought after for its beauty and unique properties. Haüyne (pronounced ah-WEEN) belongs to the sodalite mineral group, which includes sodalite, haüyne, lazurite (a sulfide-bearing haüyne variety), and nosean. Together, these minerals comprise the popular gem rock known as lapis lazuli. Haüyne is rarely found and faceted as a distinct gemstone. Collectors prize its beautiful, deep blue color, although it can also occur in other hues. Prices of up to $20,000 per carat were reached in the past years for stones in best quality. Tanzanian material has a lower refractive index (RI) and higher specific gravity (SG) than other haüynes. Note that glass has RI, SG, and hardness values that overlap those of haüyne. (Glass pieces, of course, can come in any color). A spectroscopic reading of absorption spectra might help distinguish these materials