Jun 1, 1982 · Iolite’s most desirable colors are in the violetish blue to fine blue range. Properly oriented inclusions can cause cat’s-eyes and aventuresence. Iolite is most often faceted, as this cutting style serves to highlight its fine transparency. Fine-quality faceted iolites over five carats are relatively rare in the market.

The color of Iolite is considered to be quite soft compared to other blue gemstones such as Sapphires. If the gem is cut correctly, the pleochroism of Iolite will display three different colors of light – light blue, violet blue and a yellow-ish gray. Iolites vs Blue Sapphire

In the hands of a skilled cutter, iolite’s beauty can be revealed. This silicate of aluminum, iron, and magnesium has two distinctive features—a beautiful, violetish blue through slightly violetish blue hue derived from iron and a striking, eye-visible pleochroism. Its pleochroic colors differ with its …

Iolite is the gem-quality blue or blue-violet variety of cordierite. While iolite enjoyed popularity in jewelry in 18th-century Europe, this naturally beautiful gemstone is relatively new to today's jewelry market, and is regaining popularity with the public.

Iolite gemstone exhibits a stunning blue to violet color and has a transparent to translucent appearance. It has a strong pleochroism, displaying different colors when viewed from different angles. It is also known for its strong durability and is rated 7-7.5 on the Mohs scale of hardness.

Vivid violet to blue are iolite’s best and most valued colors. It is highly pleochroic, so a cutter must orient the cut of the stone carefully so the best color shows through the gem’s table. Commercial-quality iolite often has a grayish color component.

Jul 1, 2024 · Color: Iolite’s most famous characteristic is its pleochroism, which causes it to exhibit varying colors depending on the angle of observation. These colors typically include violet-blue, blue, and sometimes even yellow or gray.