2.9" Sparkling, Vibrant Blue Hemimorphite - M'fouati Mine, Congo

This is a stunning, 2.9" tall, sparkling, botryoidal hemimorphite specimen that comes from a mine near the site that produces veszelyite. It was collected from the M'fouati Mine in the Republic of the Congo (Brazzaville).

It has been mounted to an acrylic display base with glue.

Hemimorphite is a basic hydrous zinc silicate with the chemical composition Zn4Si2O7(OH)2 · H2O. It earned its name from the Greek terms that best define its crystal structure. It has two different terminations on each side of the crystal, hence the inclusion of the greek terms "hemi", meaning half, and "morph", meaning shape. The crystal formations can range anywhere between a crystal druze or botryoidal formation to radiating acicular crystals and more. Hemimorphite has been found in shades of white, beige, light brown, and a bright, electric blue. It can also form as yellow and green crystals on rare occasions.

Prior to 1803, hemimorphite and smithsonite were thought to be the same mineral, called "calamine". However, further scientific research concluded that these were two distinct minerals.
M'fouati Mine, M'Fouati District, Bouenza Dept., Republic of the Congo (Brazzaville)
2.9 x 2.1"