The most apparent feature of the above garnet is its shanging color under the influence of daylight against tungsten light, due to the balance of light.
This phenomenon is a rare occurence in garnet, especially in combination with a large size, as in the present casz.

The colour-changing garnet described in the Gemstone Report No 60813 from the Swiss Gemmological Institute SSEF possesses extraordinary characteristics and merits special mention and appreciation.
The described gemstone exhibits an impressive size and weight ot 32.416 ct combined with an outstanding purity and a distinct colour-change ettect. the colour changes from a slightly greenish brown in daylight to a deeply saturated red colour when viewed in incandescent light (e.g. tungsten lamp). This effect is related to the presence of minor amounts of vanadium in this garnet of the pyrope-spessartine garnet series.
Colour-changing garnets – including the stone described in this report – are mostly found in association with graphite-rich metasedimentary gneisses in East-Atrica, notably Southern Kenya and Northern lanzania. These geological provinces are well-known to gemmologists for their wealth in gemstones.
The described gemstone has been spared exposure to any treatment and its colour, colour change, and purity are all natural.
The described gemstone is the largest colour-changing garnet so far certified at the Swiss Gemmological Institute SSEF and with its combination of outstanding characteristics is a very exceptional treasure.