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in color, one of the most valuable and rare stones in the gemological world.
* Melanite: Black in color due to limited substitution of titanium for iron. Also known as "titanian andradite". Forms a solid solution with morimotoite and schorlomite depending on titanium and iron content.
* Topazolite: Yellow-green in color and sometimes of high enough quality to be cut into a faceted gemstone,

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