Technically known as oligoclase, sunstone feldspar is a species of plagioclase feldspar. It has a red metallic glitter, which is caused by light interference from tine hematite or goethite plates present within. It is mostly cut as a cabochon or as a flat surface to show this metallic effect more clearly.

Locations:

Sunstone feldspar is found in Norway, India, USA, Canada and the former USSR.

Chemical Composition: Potassium Aluminum Silicate
Crystal Structure: Triclinic
Hardness: 6
Specific Gravity: 2.64
Refractive Index: 1.54-1.55
Colors: Orange to red brown.
Luster: Vitreous

Astrological Relevance:

Sunstone feldspar is considered to be one of the birthstones for the month of August, which covers two zodiac signs: Leo (July 22 To August 22) and Virgo (August 22 To September 22).