Cerussite: lead carbonate, mineralogy, precautions and care

← Back to Guide to stones

Cerussite is a white to grey lead carbonate with an adamantine lustre, often twinned into star shapes. It contains lead: mineralogy, the history of white lead, safety and care.

Key points

Colour	colourless, white, grey, sometimes greenish or brownish
Mineral family	lead carbonate, PbCO3
Crystal system	orthorhombic (same structure as aragonite)
Hardness (Mohs)	about 3 to 3.75
Density	about 6.5 (very heavy for a light-coloured mineral)
Lustre	adamantine (bright, like a diamond)
Remarkable form	six-pointed star-shaped twins or lattice-like networks
Origin of the name	Latin cerussa, “white lead”, the lead white pigment
Known deposits	Tsumeb (Namibia), Morocco, Germany, Czech Republic, Cornwall, Pennsylvania, New South Wales
Precautions	contains lead: see the safety box below

What is cerussite?

Cerussite is a lead carbonate (PbCO3), which contains nearly 77% lead. It is often colourless, white or grey, transparent to translucent, with a remarkable adamantine lustre: it shines almost like a diamond. It is soft (3 to 3.75 on the Mohs scale), fragile, and very heavy for a light-coloured mineral (density about 6.5). It belongs to the same structural family as aragonite.

Its name comes from the Latin cerussa, “white lead”, that is, the lead white pigment. It forms in the oxidation zone of lead deposits, by alteration of galena, of which it is a common product. It is therefore an excellent example of how one mineral can turn into another.

Star-shaped crystals

Cerussite is famous for its twins: crystals that intergrow at regular angles, often three by three, producing six-pointed stars or lattice networks, like white lace. These forms are sought after by collectors. Classic deposits include Tsumeb in Namibia, Morocco, Germany, the Czech Republic, Cornwall, Pennsylvania and New South Wales.

Clearer crystals have sometimes been cut as gems: the largest faceted cerussite known weighs 890 carats (the “Light of the Desert”). These stones are purely collector’s objects, too soft and too fragile to be worn.

Safety: a mineral that contains lead

Never in the mouth, nor within reach of children and animals: lead is toxic, and children and pregnant women are particularly sensitive to it. Cerussite dissolves in acids, so if swallowed it is, in principle, more dangerous than galena.
No elixirs, nor soaking water to drink.
Dust: fine crystals crumble. Do not file, sand, saw or crush it without a filter mask, gloves and ventilation. Do not heat it: lead fumes are dangerous.
Hands: wash your hands with soap and water after each handling, and before eating or touching your face.
Environment: do not pour wash water into the environment; take waste to a recycling centre.

If it is swallowed accidentally, call a poison control centre, 15 (the emergency medical number in France) or 112 (the emergency number throughout the European Union). See also our page on toxic stones.

White lead, or ceruse

“White lead” is a manufactured lead carbonate (in fact a basic carbonate, close to cerussite) which for centuries was the white pigment of painters and an ingredient of cosmetics. Its toxicity, which caused lead poisoning among house painters, led many countries to ban it for paint in the 20th century. The natural mineral that bears the name cerussite is not the powder used in the past, but it is chemically very close to it, and that is the reason both for its name and for the caution required.

This history shows why the nature of a stone, not just its appearance, matters for choice and safety.

Traditional symbolism

Cerussite has no ancient tradition in the world of stones. Its “black and white diamond” lustre and its stars evoke clarity, structure and rigour. Some authors link it with lead and therefore with Saturn in alchemical tradition (see the galena page).

These associations are symbolic, with no scientific evidence. Given its lead content, cerussite is a mineralogy piece rather than a pocket stone.

Traditional correspondences

Domain	Correspondence cited
Planet	Saturn (lead, in alchemy)
Chakra	crown or third eye, according to the few authors who mention it
Element	earth or air
Signs	Capricorn, Aquarius (very variable)
Keywords	clarity, structure, rigour

These correspondences are rare and differ widely (see the origin of the chakras).

How to use it and care for it

As a collector’s piece: a group of crystals on its host rock, in a display case or closed box.
Cleaning: a very soft brush or a blower bulb. No water, no acid: the crystals are fragile.
Knocks: the twins break easily. Handle it by its host rock.
Light: no known risk; avoid strong heat.
Not as jewellery: soft, fragile and containing lead.

For symbolic cleansing, prefer sound (guide); neither water nor salt.

Recognising and choosing cerussite

Sign	Cerussite	Easily confused with
Lustre	adamantine, bright	calcite and aragonite (vitreous, lighter)
Weight	very heavy for its size	quartz, calcite (much lighter)
Form	six-pointed stars, lattice networks	quartz, barite
Deposit	oxidation zone of lead veins	pegmatites (other minerals)

When choosing, prefer a stable piece with clean crystals and a stated provenance (Tsumeb, Morocco, etc.): fine pieces are expensive, because they are rare. See also galena, pyromorphite and aragonite, its neighbours in deposit or structure. For other pointers: real or fake stone? and Our commitments.