- Chemistry: Pb2Al4(CO3)4(OH)8
- 3H2O, Hydrated Lead Aluminum Carbonate Hydroxide.
- Class: Carbonate
- Uses: As a very minor ore of lead and as mineral specimens.
Dundasite, which is named for the famous mines at Dundas, Tasmania,
Australia where it is found, is a rare lead aluminum carbonate mineral.
It is found with other lead minerals such as cerussite
and crocoite. Cerussite
is similar in color to dundasite but is significantly heavier. Crocoite
is probably the most famous mineral from the Dundas mines and has a bright
orange to red color. Together with the snow white crusts of dundasite and
the striking color of crocoite, the combination makes for attractive mineral
- Color is white.
- Luster is vitreous to silky.
- Transparency: Crystals are transparent to translucent.
- Crystal System is orthorhombic.
- Crystal Habits: Generally limited to crusts and small aggregates
of radiating acicular crystals.
- Hardness is 2
- Specific Gravity is 3.5 (somewhat heavy for translucent minerals)
- Cleavage is perfect in one direction.
- Fracture is uneven.
- Streak is white.
- Associated Minerals include cerussite
- Notable Occurrences include Dundas, Tasmania, Australia and
Wensley, Derbyshire and Trefriw, Gwynedd, Wales, England.
- Best Field Indicators are locality, softness, density, color
and crystal habit.