Opal is a gemstone used in a variety of crafting recipes in RuneScape: Dragonwilds, including the Crystal Bow, a Masterwork weapon. You must unlock the ability ...

For Monica Rich Kosann, whose high jewelry collection, The Jewels of Nature, uses rare Australian black and crystal opals and ...

The crystals, along with other minerals such as opal, were found in Jezero Crater, an area known for its past water activity.