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All About Hessonite

Hessonite garnet or Gomed is one of the various types of garnets. The Hessonite garnet also known as Gomed is also called the Cinnamon stone as it was first discovered in Sri Lanka a land known for it's spices.

Composition of Hessonite Garnet or Gomed

The chemical composition of the hessonite garnet is calcium aluminum silicate (Ca3Al2 {SiO4}3). The specific gravity is 3.65 and the refractive index ranges between 1.742 and 1.748. The hardness of a garnet on the mohs scale is 7.25.


The best colour for the hessonite garnet is medium to dark orange or brown orange to brown yellow with some variation in tone. The hessonite garnet gem stone gets it excellent colour from the trace element iron the mineral manganese.


Hessonite garnets are usually used in rings and natural rough cut garnets are usually cut to form round and oval shapes in most cases. They are also cut and faceted into rectangles and squares or even hexagons.


Hessonite garnets measuring from 2 to 5 carats in weight are have a higher demand in the market. This is because most astrologers recommend gems of this size for therapeutic uses.


Hessonite garnets are found in a range of transparencies, varying from very transparent, to slightly opaque to fully opaque. However the transparent varieties are preferred especially when the gem is being bought to be worn for astrological reasons.

Treatments done on Hessonite Garnet or Gomed

Generally treatments are carried out on gemstones in the production stage for enhancement of the quality. This is mainly done to lighten or darken the colour. Some other treatments are also meant to improve the clarity and transparency of the stone to fetch a better price in the market. However, there is no evidence that a treatment for hessonite garnet exists as on date. Therefore most garnet gems that you find in the market today are untreated.