Color Change Garnet, from Tanzania

Color Change Garnet

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Project Description

Color Change Garnet, from Tanzania

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A mix of spessartite and pyrope garnet. This garnet presents a color change from brownish in daylight to a rose pink in incandescent light. The color change is quite intense and dramatic, surpassing that of the more expensive alexandrite.

Color Change Garnet

A rare and valuable member of the garnet group of gemstones. It is highly desired for its distinct ability to change color depending on the type of light source with which it is viewed. The ability to color change is often erroneously mistaken for pleochroism, which is the ability to exhibit different colors depending on the viewing angle, whereas the phenomena of color change is not dependent on the viewing angle. Color change garnet is typically a hybrid-mix of spessartite and pyrope garnet and in many cases, may also contain traces of grossularite or almandine garnet.

Color-change

The intensity of color-change can be quite dramatic, often surpassing that of the finest alexandrite. Most of those garnets will exhibit a brownish-green or bronze color when viewed under natural daylight, but when viewed under incandescent light, it will appear rose to pink in color. There are a variety of other color change combinations possible. In order to truly appreciate the full range of color change garnet, specimens should be observed under a variety of lighting conditions, including early morning daylight, late afternoon daylight, fluorescent light and incandescent light or candlelight.

Treatment

Like most garnet gemstones, color change garnet is not known to be treated or enhanced in any way.

Chemical Formula: [Mg3 + Mn3]AL2(SIO4) – Manganese aluminum silicate
Crystal Structure: Cubic – rhombic, tetrahedron
Hardness: 7 to 7.5
Refractive Index: 1.73 – 1.81
Density: 3.65 to 4.20
Cleavage: None
Transparency: Transparent, translucent, opaque
Luster: Vitreous

Color Change Garnet, from Tanzania

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