Iolite, also known as Cordierite, is a mineral that belongs to the silicate group. It is a transparent to translucent gemstone that comes in different shades of blue, purple, and gray. The blue-violet variety of iolite is the most popular and is often used in jewelry.

Iolite has a unique property called pleochroism, which means that it displays different colors when viewed from different angles. This property makes it a popular gemstone for designers who want to create jewelry with a dynamic appearance.

The chemical formula of iolite is (Mg,Fe)2Al3(SiO4)3. It has a crystal structure that belongs to the orthorhombic system and can form prismatic or tabular crystals. Iolite is mostly found in metamorphic rocks such as gneiss, schist, and migmatite.

Iolite is a relatively hard mineral with a hardness of 7.5 on the Mohs scale. It has a specific gravity of 2.6 to 2.7, which is similar to that of quartz. Iolite also has a high birefringence, which means that it can split light into two different directions, giving it a unique visual appearance.

Due to its pleochroic nature and durability, iolite is commonly used in jewelry making. Its unique coloration and interesting optical properties make it a popular choice for designers looking to create pieces that stand out. Iolite is also sometimes used in industrial applications due to its hardness and resistance to wear.

There’s no question Iolite is beautiful and fascinating with unique optical properties. Its aesthetic and functional properties make it a true gem not to be passed up!

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