Amethyst Stalactite Slice from Uruguay sphene somewhat more pronounced following shortwave

somewhat more pronounced following shortwave illumination

and honey color hyalite opal

Size: approximately 62 to 76 grams

Chlorite included quartz crystal cluster

Under UV light (365 nm)

Amethyst Stalactite Slice from Uruguay sphene somewhat more pronounced following shortwaveAmethyst 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