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Natural Demantoid

Demantoid, (a green form of andradite garnet), is one of the most highly prized of all garnets.

  • There are 9 Demantoid gemstones available at
  • Demantoid(s) are organized in the following categories: CalibratedSingle,  gemstones.
  • Our most expensive Demantoid is USD 9800.00 and largest Demantoid weight is CTS 2.83.
  • Our cheapest Demantoid is USD 6.00 and smallest Demantoid weight is CTS 0.04.

Find your Demantoid

Our Demantoid(s) are available in various shapes, sizes and colors. 9 Demantoid(s), too many to look through? You may select any combination of search options. Colors grade into each other and you can search for more than one color at once. For a better selection, try selecting two or three colors, -- your first choice plus the two closest colors.

Color range
strongly yellowish green
slightly yellowish green
yellowish green

Demantoid Profile

Color information: Green, yellow green.
Refractive Index: 1.888 - 1.889
Chemical Composition: Ca3Fe2(SiO4)3
Hardness: 6.5
Density: 3.82 - 3.50
Crystal Group: Cubic
Ocurrence: Russia, Namibia, Iran, South Africa
Sign of the Zodiac: N/A
Month of the year: N/A
Demantoid Demantoid
The distinctive features of demantoid are the characteristic inclusions of yellow byssolite (asbestos) fibers with radiating arrangements known as 'horsetails'. Although the horsetails are diagnostic for demantoid, they are not required for a stone to be identified as a demantoid. The identification of demantoid is based on the chemistry and refractive index of the stone. Many stones do not have horsetails at all.

Apparently, only the Russian demantoids possess the horsetail inclusions. Namibian stones are not known to ever have horsetails. The Pakistani stones may have occasional horsetails or possibly single fibers of byssolite but this has not been confirmed. If the horsetail-byssolite inclusions are present in the Pakistani stones, they are not clearly defined and very difficult to distinguish from the other inclusions.

Although, the Russian stones with horsetails seem to be worth much more than the demantoids from other localities, we also value demantoids according to their color and clarity. Demantoid has a very high refractive index (even higher than diamond) and will be remarkably bright and beautiful if cut correctly. If the color, cut, and clarity are good but the stone does not have horsetails, it is still a valuable stone.

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Finest gems/
Ruby Single
From our finest gemstones collection
Ruby Single Cushion Eye clean to Slightly included
Size: 11.33 X 9.07 MM
Weight: 5.530 CTS
Shape: Cushion
Clarity: Eye clean to Slightly included
Usually ships within 24 hours
USD 243320.00

Deal of the Day/
Chrysoberyl Closeout
limited time offer, ref# CB11259ac
Chrysoberyl Closeout Mixed shapes Slightly to Heavily included
Weight: 21.560 CTS
Shape: Mixed shapes
Clarity: Slightly to Heavily included
Usually ships within 24 hours
10 % OFF, YOU SAVE 42.26 USD
USD 380.31

Today’s Trade/
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309 Alexandrite ’s available
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Tanzanite Tanzanite
434 Tanzanite ’s available
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Zircon Zircon
242 Zircon ’s available
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Gemstone Variety: Hits Index
Going Down Amber -3111 -0.1%
average price USD 174.55 per item
Going Down Sapphire -454 +-0.0%
average price USD 355.24 per item
Going Down Alexandrite -569 -0.1%
average price USD 1716.56 per item
Going Down Anatase -140 -0.1%
average price USD 185.71 per item
Going Down Turquoise -667 -0.3%
average price USD 53.43 per item
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Gem Library /
Gems Legend and  Lore This month birthstone: Alexandrite, Pearl
More from the Gem Library about Birthstones.
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May 21 – June 20
Dual nature. You can go in many directions. Your zodiac stone...more

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