L'Opaline

Opaline, also known as "Rainbow Stone", is a synthetic stone often misrepresented as Noble Opal or Moonstone. It is made of glass rendered milky by the addition of tin oxides and lime phosphate.

Its low cost and magnificent shimmering reflections, which mimic the opalescence of the highly sought-after Noble Opals, make Opaline a highly prized stone in jewelry.

Being an artificial stone, I don't think it has any lithotherapy virtues, except perhaps for the feeling of calm that occurs when looking at it and the wonder that can be experienced when contemplating its beautiful reflections.