General Information |
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A variety or type of: | Almandine-Pyrope, which is a variety of Garnet Group |
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Photos of natural/un-cut material from mindat.org |
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Rhodolite Treatments |
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This material is reported by G.V. Rogers (unpublished observation) to change from purplish color to a hessonite-type brownish color on heating. A brief check confirmed this change at about 600°C in some rhodolites, but not in others; it could not be reversed by gamma irradiation – Nassau (1984) |
Physical Properties of Rhodolite |
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Mohs Hardness | 7 to 7.5Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references |
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Specific Gravity | 3.84 +/-Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references |
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Optical Properties of Rhodolite |
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Refractive Index | 1.760 +/-Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references |
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Optical Character | IsotropicHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) |
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Colour |
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Colour (General) | Red, brownish-red, violet-redUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) |
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Colour (Chelsea Filter) | (Dark) redHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) |
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Causes of Colour | Reddish purple, Fe2+ in distorted cubic coordinationW. William Hanneman, Pragmatic Spectroscopy For Gemologists (2011) |
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Transparency | TransparentUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) |
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Crystallography of Rhodolite |
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Crystal System | IsometricHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) |
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Inclusions in Rhodolite |
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Orientied rutile needles, apatite, undulatory extinction - Gemmological Tables, Ulrich Henn and Claudio C. Milisenda, 2004, p 25 |
Further Information |
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Mineral information: | Rhodolite information at mindat.org |
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Significant Gem Localities |
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| Kenya | |
| Barot (1993) | | Mozambique | |
| J. Marques (2009) | | Sri Lanka | |
| G. Zoysa (2009) |
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