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Tinguaite - TINGUAITE - unique stone having 2 deposits in the world. It Is named in honour of a deposit in mountains de Tingua in Brasil. It is marked extremely rich textured variety ("streaky", "tortoise" and "dactyloscopic" tinguaite) and wide colour scale: from black and dark green up to greenish-grey tones. It is established, that the most effective "tortoise" TINGUAITE is from Hibin massif. It have no analogues in the world. The stone is in 3 times stronger than a granite, it has heightened viscosity and polished up to mirror shine. TINGUAITE - the rock consisting of alkaline feldspar, nepheline, aegirite, sometimes with biotite; This rock is characterized by "tinguaite structure", in which the needles of aegirite meet between mosaically located alkaline feldspar and foides. www.britannica.com pale- to dark-green, very fine-grained igneous rock that may be considered the dike (tabular body injected in fissures) equivalent of phonolite. It contains alkali feldspar and nepheline, with aegirine or aegirinaugite. Tinguaite in which the amount of feldspathoid (nepheline) equals or is greater than that of feldspar has a characteristic texture: the light- coloured… |
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