3 - Vesuvianite

ID	3
Mineral	Vesuvianite
Location	Ural Mountains - Russia
Fluorescence	LW-UV: close SW-UV: close
Mindat.org	View Vesuvianite information at mindat.org

ID	4223
Long ID	1:1:4223:5
Formula	`(Ca,Na)₁₉(Al,Mg,Fe)₁₃(SiO₄)₁₀(Si₂O₇)₄(OH,F,O)₁₀`
IMA Status	0 1
Other Occurrences	Skarns or regional metamorphism of limestones.
Discovery Year	1795
Diapheny	Transparent,Translucent
Cleavage	Poor on {110} Very poor on {100} {001}
Tenacity	brittle
Colour	Brown, yellow, brown-black, light green, emerald green, white, red, purple, violet, blue-green to blue
Hardness (min)	6.5
Hardness (max)	6.5
About the name	Originally named "hyacinthus dictus octodecahedricus" by Moritz Anton Kappeler in 1723. Renamed "hyacinte du Vesuve" by Jean-Baptiste Louis Romé de L'Isle in 1772. This was possibly the inspiration for Abraham Gottlob Werner to rename the species "vesuvian" in 1795, after its discovery locality, Mount Vesuvius, Campania, Italy. In 1799, Rene Just Haüy introduced the name "idocrase", which was formerly a popular name.
Streak	White
Crystal System	Tetragonal
Cleavage Type	Poor/Indistinct
Fracture type	Irregular/Uneven,Sub-Conchoidal
Morphology	Short pyramidal to long prismatic, columnar, granular, massive.
Twinning	Twinned domains observed at very fine scale.
shortcode_ima	Ves

Vesuvianite