Idocrase (Vesuvianite) – Vesuvianite, or Idicrase, is a silicate mineral found in green, brown, yellow and blue. This tetragonal crystal formation was first found in Mount Vesuvius, Italy in 1795. Idicrase can be set at a natural crystal in jewelry or faceted to create a vivid gemstone.

Imperial Jasper – Imperial jasper displays vivid orbicular patterns that can be seen in mauves and pinks to vibrant green and teal and is one of five fine jaspers.

Imperial Topaz – Imperial topaz is one of few naturally occurring topaz color variations that is yellow to peachy-pink and less common than other topaz. It grows in columnar crystals and is generally the highest valued topaz variety.

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Iolite – Iolite is a silicate mineral that is generally a bluish violet color, though it can sometimes have a yellowish-grey colorshift. The gemmy translucent color of Iolite makes it a popular and affordable alternative to Sapphire.