Hessonite
Madagascar
22.77 carats
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Hessonite Gemstones by Colour
This table shows the variety of hues this gemstone can be found in. Click on a photo for more information.
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Hessonite Gemstones by Size
This table shows distribution of Hessonite gemstone sizes that are listed on this site. This can give a good indication as to the general availability of this gemstone in different sizes.
Contributed photos
Lightest:0.25 cts
Heaviest:23.21 cts
Average:5.24 cts
Total photos:47
Do you have a larger Hessonite? Why not upload a photo?
| General Information | ||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| A variety or type of: | Grossular, which is a variety of Garnet Group | |||||||||||||||||||||||||
| Physical Properties of Hessonite | ||||||||||||||||||||||||||
| Mohs Hardness | 7 to 7.5, Blue Chart Gem Identification (2010) More from other references | |||||||||||||||||||||||||
| Specific Gravity | 3.55 to 3.73, Blue Chart Gem Identification (2010) More from other references | |||||||||||||||||||||||||
| Fracture | Uneven,ConchoidalWikipedia (2012) | |||||||||||||||||||||||||
| Optical Properties of Hessonite | ||||||||||||||||||||||||||
| Refractive Index | 1.742 to 1.748, Blue Chart Gem Identification (2010) More from other references | |||||||||||||||||||||||||
| Optical Character | Isotropic, Blue Chart Gem Identification (2010) Anomalous double refraction | |||||||||||||||||||||||||
| Colour | ||||||||||||||||||||||||||
| Colour (General) | Brownish, brownish-yellow, orange-red, brown, yellow, Gemmological Tables (2004) | |||||||||||||||||||||||||
| Causes of Colour | Orange, Mn2+ in distorted cubic coordination, Fe3+, Pragmatic Spectroscopy For Gemologists (2011) | |||||||||||||||||||||||||
| Transparency | Transparent, Gemmological Tables (2004) | |||||||||||||||||||||||||
| Fluorescence & other light emissions | ||||||||||||||||||||||||||
| Fluorescence (General) | Inert, Blue Chart Gem Identification (2010) | |||||||||||||||||||||||||
| Crystallography of Hessonite | ||||||||||||||||||||||||||
| Crystal System | Isometric, Blue Chart Gem Identification (2010) More from other references | |||||||||||||||||||||||||
| Inclusions in Hessonite | ||||||||||||||||||||||||||
| Characteristic "heat-wave" effect, honey-like appearance. Rounded crystals of apatite, calcite, zircon - Blue Chart Gem Identification, Herve Nicolas Lazzarelli, 2010, p. 3 Inclusions: diopside, apatite - Gemmological Tables, Ulrich Henn and Claudio C. Milisenda, 2004, p 24 | ||||||||||||||||||||||||||
| Further Information | ||||||||||||||||||||||||||
| Mineral information: | Hessonite information at mindat.org | |||||||||||||||||||||||||
| Significant Gem Localities | ||||||||||||||||||||||||||
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