Lapis lazuli

Frae Wikipedia
Jump to navigation Jump to search
Lapis lazuli
Lapis-lazuli hg.jpg
Lapis lazuli frae Afghanistan in its naitural state
General
CategoryRock
Formula
(repeatin unit)
mixtur o minerals wi lazurite as the main constituent.
Creestal seestemNone, as lapis is a rock. Lazurite, the main constituent, frequently occurs as dodecahedra
Identification
ColourMedium Blue, mottled wi white calcite an brassy pyrite
Creestal habitCompact, massive
FracturUneven-Conchoidal
Mohs scale haurdness5–5.5
Skinkledull
Streaklight blue
Speceefic gravity2.7–2.9
Refractive index1.5
Ither chairacteristicsThe variations in composeetion cause a wide variation in the abuin values.

Lapis lazuli /ˈlæpɪs ləˈzl/ or /-ˈlæʒl/ (whiles abbreviate tae lapis) is a deep blae semi-precious stane that haes been prized syne antiquity for its intense colour.