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DG0088 : 2.31ct Demantoid Garnet – 8mm

HKD 8,023

Rated 4.93 out of 5 based on 905 customer ratings

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Loose Demantoid Garnet Gemstone GIA Certified Demantoid Garnet
Demantoid Garnet price per carat HKD 3,471

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Certification service for gems that do not already have certificate or require additional certification from different lab. View Sample Certificates

All our items are 100% Natural Gemstones – no lab or synthetic.

Gem Specifications

SKU DG0088
Gem Type Natural Demantoid Garnet
Piece(s) 1
Weight (ct) 2.31
Shape Round
Treatment None
Clarity None
Size (mm) 7.88 x 7.98 x 5.10
Origin Namibia
Lab GIA /
Cert no. 1203292722
sku DG0088
Type Natural Demantoid Garnet
Piece(s) 1
Weight (ct) 2.31
Shape Round
Treatment None
Clarity None
Size (mm) 7.88 x 7.98 x 5.10
Origin Namibia
Lab GIA /
Cert no. 1203292722





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Color Scheme

This color scheme is generated by the system using the colors from the product image.

*For Reference only

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DG0088 Gemstone Color Scheme


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Gemstone Shape

Gemstone Shape Chart


This is the geometric shape for the gemstone. Some shapes has variations due to dimension.


Gemstone Cut

Brilliant Diamond Cut

Cut to perfection to maintain high quality products in our inventory.

Transparent Pricing

Our Gemstones are cut & polished by the same craftsman who make gemstones luxury brands, but sold at a fraction of the price.

We avoid traditional 10x mark-ups by being 100% transparent in our pricing and offer mine-to-market business model.

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HKD 8,023


HKD 18,389


Gem Certification By GIA

We provide gemstone certification service for all our gemstones and use only reputed labs for certification. Our partnered labs have been in the gem industry for very long time and we do not recommend any other lab that is not mentioned here for certification.

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Mineral : Garnet
Mohs Hardness : 7.5 - 8.0
Refractive Index : 1.881 – 1.888
Specific Gravity : 3.82 – 3.88


Demantoid Garnet is one of the rarest garnet varieties. It can be found in a green color vibrant enough to rival emeralds. They are highly prized stones for gem collectors, jewelers and jewelry enthusiasts.

Despite the discovery of new sources of Demantoid during the 1990’s the stone still remains very rare. Is it the most valuable of the garnet family as well as the most well-known andradite garnet. A clean facetable stone can command a high price per carat. However, the stones collectors seek out the most are demantoids with horsetail inclusions, wavy golden and fibrous inclusion.


Demantoid was discovered in Russia in the early 19th century. In 1854, mineralogist Nils Gustaf Nordenskiöld recognized this gemstone as a variety of Andradite garnet. The gemstones had exceptional brilliance and a dispersion which inspired the mineralogist to name them after their ‘diamond-like’ appearance, giving birth to the name Demantoid.

The truth is that demantoids have greater brilliance and a higher dispersion than diamond as well as other well-known green gemstones, like emerald and peridot for example. The dark colors of their body may mask dispersion, smaller demantoids with lighter colors and hues are dazzling under natural light.

The gemstone was very popular during the Belle Époque period of the late 19th and early 20th centuries. It was most popular in Art Nouveau jewelry and was highly favored by the Russian Czars.

For a long period of time, Russia was the only source for these garnets. Supplies soon began to run low and the gems were usually only seen in antique pieces of jewelry. However, since the 1990’s sources have been discovered in Namibia, Madagascar and other sites. The Russian mining has also been renewed and Demantoid Garnet are available again today. However, in the modern-day market, they are expensive stones because they are highly desirable.

Charecteristics : horse tail

Horsetail inclusions of byssolite or chrysotile, usually with a golden color, obtain their name because of their long, wavy appearance. These inclusions have long been considered diagnostic for identifying demantoids. However, a study in 2018, found horsetail inclusions in non-demantoid (brown) andradite. Thus, while horsetails are a good identifying characteristic, it isn’t sufficient, as other stones also have horsetail inclusions and not all demantoids have them.

Demantoids may looks similar to emeralds in color and appearance, however, the optical and physical properties of both stones differ greatly. Demantoids have greater dispersion and no birefringence.


As we mentioned earlier, Russia was the only source for demantoids for a long time. Notable gem sources include the Ural Mountains region, the Koryakskoe plateau, and the Kola Peninsula.

Since 1996 and 2009, respectively, Namibia and Madagascar have become important sources.

In Italy, Ala, Piedmont produces dark, apple-green material. Val Malenco, Sondrio Province also produces demantoid.

Other notable sources include:

  • Russia
  • Africa


Demantoids should be cleaned using warm soapy water and a soft brush. Avoid all mechanical cleaning and exposing your stone to extreme heat.

Some demantoids may have a hardness of 7.5, which means they are somewhat susceptible to scratching. Therefore, use protective settings for these gems, especially if used as ring stones.