What is Moonstone?


Moonstone is a unique gemstone belonging to the feldspar family, known for its opalescent sheen that creates a phenomenon known as adularescence. This optical effect gives the stone its moon-like glow, which has captivated human imagination for centuries. Moonstone is found in various parts of the world, including Sri Lanka, India, and Madagascar. It has been used in jewelry and spiritual practices for generations, and its name is derived from its resemblance to the moon, capturing the essence of lunar beauty and mystery.

Moonstone is an ethereal gem characterized by its opalescent sheen, which creates a moon-like glow. This captivating feature has made it a popular choice for jewelry and spiritual practices alike. Its unique appearance and metaphysical properties have contributed to its enduring popularity, making it a gemstone that is as meaningful as it is beautiful.

Gemstone Properties

Chemical ClassificationInorganic - Feldspar
ColorRanges from colorless to white, blue, peach, pink, and even gray or brown.
TransparencyTransparent to translucent.
OccurrenceIndia, Sri Lanka, and Myanmar.
FormationMoonstone is formed from the cooling and solidification of molten rock (magma).
DiaphaneityTranslucent with adularescence
CleavagePerfect in two directions
Mohs Hardness6 to 6.5.
Specific GravityApproximately 2.56.
Diagnostic PropertiesAdularescence (blue-white shimmer).
Chemical Composition(Na,K)AlSi3O8
PleochroismNot exhibited in moonstone.
Crystal SystemMonoclinic (Orthoclase/Albite)
Optical PropertiesBiaxial (+)
Refractive Index1.518 - 1.526
Birefringence0.008 - 0.010
2V angleMeasured: 50° to 65°
DispersionNot typically relevant for moonstone.