Amethyst Stalactite Slice from Uruguay Korite That color mix — cyan

That color mix — cyan fluorescence with greener afterglow - is consistent with Mn-activated calcite with minor secondary activators and

much of the mining is done in thousands of small hand-worked digs

Heulandite was named in 1822 after John Henry Heuland

Beautiful pastel polished freeform chrysocolla flames that originate in Peru

Amethyst Stalactite Slice from Uruguay Korite That color mix — cyanAmethyst 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