gemstone

Sunstone and Garnet

Plagioclase Feldspar ((Na,Ca)(Al,Si)4O8) and Almandine Garnet (Fe3Al2(SiO4)3)

Hardness: 6-7.5 (Sunstone: 6-6.5, Garnet: 6.5-7.5); Color: Peach/orange-pink with metallic schiller (Sunstone) and deep dark red/maroon (Garnet); Luster: Vitreous to sub-vitreous; Crystal System: Triclinic (Sunstone) and Isometric (Garnet); Specific Gravity: 2.62-4.3.

Hardness: 6-7
Luster: Vitreous to sub-vitreous

Identified July 29, 2026More gemstone →

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Physical properties

Formation & geological history

Sunstone forms in igneous and metamorphic rocks, often containing microscopic copper platelets that create its signature aventurescence. Garnet forms in high-temperature and high-pressure metamorphic environments like schists and gneisses, as well as in igneous pegmatites.

Uses & applications

Used primarily in lapidary arts, beaded jewelry, pendants, and crystal collecting.

Geological facts

Sunstone's shimmering effect, known as aventurescence, is caused by light reflecting off tiny inclusions of metallic copper or hematite. Garnet has been used as a gemstone since the Bronze Age and is often associated with vitality and protection.

Field identification & locations

Readily identified by the characteristic metallic glitter suspended within the translucent pinkish-orange sunstone beads contrasted against the deep, dark red garnet beads. Frequently used together in metaphysical jewelry.

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