Stones/Gems with I

• Iolite

  Real gemstone (also called cordierite).

• Imperial Topaz

  Real gemstone variety of topaz.

• Imperial jade
• Idocrase

  Real gemstone, also called vesuvianite.

• iridescent opal

  Opal with rainbow play of color; prized gem

• Indian Jade

  Trade name for certain green stones sold as jade

• Indian Star Ruby

  Star ruby variety; Indian sources well known

• Inkstone

  Fine-grained rock used for ink; real stone in Asia

The words in the list Stones/Gems with I come from players of the word game City, Country, River.