Any copper containing minerals examples include Azurite, Chalcosite, malachite etc.
Blue John is a mineral
Blue John is a mineral
Azurite is a deep blue mineral. It is often associated with copper deposits.
The blue variety of a rare mineral used as a gemstone is called blue diamond. Blue diamonds are highly sought after for their rarity and unique color.
Azurite is a blue mineral that gets its name from the Persian word "lazhward," which means blue. It is often used in jewelry and has been prized for its vibrant blue color for centuries.
blue
The mineral that makes the color blue in gemstones is typically caused by trace amounts of elements like copper or cobalt. These elements absorb certain wavelengths of light, giving the gem its blue hue. Examples include blue sapphires with traces of iron and titanium, and turquoise with copper content.
Cobalt
blue diamond
anonymously
The most blue crystals I know of are, Copper sulphate crystals, topaz, and sapphire
Blue topaz is a type of gemstone that belongs to the silicate mineral family. It is formed from the mineral topaz with the presence of certain trace elements which give it its distinctive blue color.