Jet

Jet

Hardness ( Moh )

" 2.5-4

Crystal System

None

Specific Gravity

1.19-1.35

Refractive Index

1.64-1.68

Birefringence

Family

Colour(s)

Black, dark brown

Cleavage

Francture Type

Luster

Streak

Black-brown

Transparency

Opaque

Formula

Lignite

Country

Found In Austria,Cambodia,Canada,France,Italy,Luxembourg,Portugal,Spain,Turkey,UK,USA