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titanium and boron
Size: 35 x 30 x 23 mm
and honey color hyalite opal
cleavelandite that has some chlorite inclusions
somewhat more pronounced following shortwave illumination
Amethyst Stalactite Slice from Uruguay sphene titanium and boronAmethyst stalagmite stalactite slice from Artigas, Uruguay. Size: 61 x 50 x 5 mm. 28 grams Amethyst stalagmite slices are a type of mineral formation that occur when water containing dissolved silica and iron flows over the ceiling of a cave and forms icicle like structures. The iron gives the stalagtites a purple hue, while the silica crystallizes into quartz. When these stalagmites are cut into thin slices, they reveal a beautiful pattern of
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