Pearl
Hardness ( Moh )
" 2.5 - 4.5
Crystal System
OrthorhombicSpecific Gravity
2.71
Refractive Index
1.530 - 1.685
Birefringence
Colour(s)
white, pink, silver, cream, brown, green, blue, black, yellow, orange, gold, purple
Cleavage
Francture Type
Uneven
Luster
Streak
White
Transparency
Opaque
Formula
CaCO3
Country
Found In Australia,France,Persian Gulf,Philippines